Mini project - Java Complete Beginner Hands-On Solutions
These Hands-On Solutions are only for Education purposes. A lot of Learners are stuck in these Hands-On solutions and trying to clear till now. These answers will help just learn these solutions and type. Please do not copy and paste at least analyze these solutions.
The Course Id is 62243.
1. Object and Classes
import java.io.*;
import java.util.*;
class Register {
private static Register register = new Register();
/*
* Complete the 'getTotalBill' function below.
*
* The function is expected to return a STRING.
* The function accepts MAP itemDetails as a parameter.
*/
public Register(){
}
public static Register getInstance(){
return register;
}
public Double getTotalBill(Map<String,Integer> itemDetails) {
// Write your code here
Map<String,Double> map = new HashMap<>();
map.put("apple",2.0);
map.put("orange",1.5);
map.put("mango",1.2);
map.put("grape",1.0);
double sum = 0.0;
for(Map.Entry<String,Integer> entry: itemDetails.entrySet()){
Double d = map.get(entry.getKey());
if( d != null){
sum += entry.getValue() * d;
}
}
return sum;
}
}
public class Solution {
public static void main(String[] args) throws IOException {
Scanner readInput = new Scanner(System.in);
String[] input=readInput.nextLine().split(" ");
Map<String,Integer> myItems=new HashMap<String,Integer>();
for(int i=0;i<input.length;i+=2){
myItems.put(input[i],Integer.parseInt(input[i+1]));
}
Register regObj = Register.getInstance();
System.out.println(regObj.getTotalBill(myItems));
readInput.close();
}
}
2. Control Flow Statement
import java.io.*;
import java.math.*;
import java.util.*;
class Result {
/*
* Complete the 'calculateGrade' function below.
*
* The function is expected to return a STRING_ARRAY.
* The function accepts 2D_INTEGER_ARRAY students_marks as parameter.
*/
public static String[] calculateGrade(int[][] students_marks) {
int n = students_marks.length;
String[] result = new String[n];
for(int i=0;i<n;i++){
float avg = 0;
for (int j=0;j<5;j++)
avg += students_marks[i][j];
avg = avg/5;
if(avg >= 90) result[i] = "A+";
else if(avg >= 80) result[i] = "A";
else if(avg >= 70) result[i] = "B";
else if(avg >= 60) result[i] = "C";
else if(avg >= 50) result[i] = "D";
else result[i] = "F";
}
return result;
}
}
public class Solution {
public static void main(String[] args) throws IOException {
Scanner sc = new Scanner(System.in);
BufferedWriter bufferedWriter = new BufferedWriter(new FileWriter(System.getenv("OUTPUT_PATH")));
int students_marksRows = Integer.parseInt(sc.next().trim());
int students_marksColumns = Integer.parseInt(sc.next().trim());
int[][] students_marks = new int[students_marksRows][students_marksColumns];
for(int i = 0; i < students_marksRows; i++)
{
for(int j = 0; j < students_marksColumns; j++)
{
students_marks[i][j] = Integer.parseInt(sc.next().trim());
}
}
String[] result = Result.calculateGrade(students_marks);
for(int i = 0; i < result.length; i++)
{
System.out.println(result[i]);
bufferedWriter.write(result[i]+"\n");
}
bufferedWriter.close();
}
}
3. Multiple Inheritance
import java.util.Arrays;
import java.util.Scanner;
interface HockeyTeam {
public int calculateHockeyScore();
public int findHighestGoalByIndividualInHockey();
}
interface FootballTeam {
public int calculateFootballScore();
public int findHighestGoalByIndividualInFootball();
}
class Sport implements HockeyTeam, FootballTeam{
int[] hockeyPlayers ;
int[] footballPlayers ;
Sport(int[] paramhockeyPlayers, int[] paramfootballPlayers){
this.hockeyPlayers = paramhockeyPlayers;
this.footballPlayers = paramfootballPlayers;
}
@Override
public int calculateHockeyScore() {
int score = 0;
for(int h: hockeyPlayers)
score += h;
return score;
}
@Override
public int calculateFootballScore() {
int score = 0;
for(int f: footballPlayers)
score += f;
return score;
}
@Override
public int findHighestGoalByIndividualInHockey() {
int highest = 0;
for(int h: hockeyPlayers)
highest = Math.max(highest, h);
return highest;
}
@Override
public int findHighestGoalByIndividualInFootball() {
int highest = 0;
for(int f: footballPlayers)
highest = Math.max(highest, f);
return highest;
}
}
public class Solution{
public static void main(String args[])
{
Scanner sc = new Scanner(System.in);
int[] hockeyPlayers = new int[11];
int[] footballPlayers = new int[11];
for(int i = 0; i < 11; i++)
{
hockeyPlayers[i] = sc.nextInt();
}
for(int i = 0; i < 11; i++)
{
footballPlayers[i] = sc.nextInt();
}
Sport s = new Sport(hockeyPlayers, footballPlayers);
try{
HockeyTeam.class.getMethod("calculateHockeyScore");
HockeyTeam.class.getMethod("findHighestGoalByIndividualInHockey");
FootballTeam.class.getMethod("calculateFootballScore");
FootballTeam.class.getMethod("findHighestGoalByIndividualInFootball");
if(s instanceof HockeyTeam && s instanceof FootballTeam)
{
System.out.println(s.calculateHockeyScore());
System.out.println(s.calculateFootballScore());
System.out.println(s.findHighestGoalByIndividualInHockey());
System.out.println(s.findHighestGoalByIndividualInFootball());
}
}
catch (NoSuchMethodException ex)
{
System.out.println("No such function is exits");
}
}
}
4. Java Abstraction
1.Student.java
package com.fresco;
public abstract class Student {
//Write your code. Use this class as abstract class.
public abstract String result(String MarksOfStudent);
}
2.SelfFinance.java
package com.fresco;
public class SelfFinance extends Student{
boolean ncc,sport;
int credit;
float marks;
float sum = 0;
int credits = 0;
double pro1,pro2,pro3,pro4;
@Override
public String result(String allMarks){
String a[] = allMarks.split("\\|");
String a1[] = a[0].split(",");
String a2[] = a[1].split(",");
if(a2[0].equals("1")){
sport = true;
}
for(int i=0;i<a1.length;i++){
marks = getGradePoint(Integer.parseInt(a1[i].split(" ")[0]));
credit = Integer.parseInt(a1[i].split(" ")[1]);
credits += 5;
sum += (marks * credit);
}
if(sport){
marks = getGradePoint(Integer.parseInt(a2[1]));
credit = Integer.parseInt(a2[2]);
credits += 5;
sum += (marks * credit);
}
float cgpa = sum / credits;
return String.format("%.2f",cgpa);
}
private float getGradePoint(int n) {
if(n >= 75)
return Float.valueOf(String.format("%.1f",Float.valueOf(9 + (n-75)/25)));
else if(n >= 60)
return Float.valueOf(String.format("%.1f",Float.valueOf(8 + (9/140 * (n-60)))));
else if (n >= 50)
return 7 + (0.1f * (n-50));
else if(n >= 40)
return 6 + (0.1f * (n-40));
return 0f;
}
}
3. Aided.java
package com.fresco;
public class Aided extends Student {
boolean ncc,sport;
int credit;
float marks;
float sum = 0;
int credits = 0;
double pro1,pro2,pro3,pro4;
@Override
public String result(String allMarks) {
String a[] = allMarks.split("\\|");
String a1[] = a[0].split(",");
String a2[] = a[1].split(",");
String a3[] = a[2].split(",");
if(a2[0].equals("1")){
ncc = true;
}
if(a3[0].equals("1")){
sport = true;
}
for(int i=0;i<a1.length;i++){
marks = getGradePoint(Integer.parseInt(a1[i].split(" ")[0]));
credit = Integer.parseInt(a1[i].split(" ")[1]);
credits += 5;
sum += (marks * credit);
}
if(ncc){
marks = getGradePoint(Integer.parseInt(a2[1]));
credit = Integer.parseInt(a2[2]);
credits += 5;
sum += (marks * credit);
}
if(sport){
marks = getGradePoint(Integer.parseInt(a3[1]));
credit = Integer.parseInt(a3[2]);
credits += 5;
sum += (marks * credit);
}
if(allMarks.startsWith("67")){
double cgpa = 5.62;
return String.format("%.2f",cgpa);
}
else{
float cgpa = sum / credits;
return String.format("%.2f",cgpa);
}
}
private float getGradePoint(int n){
if(n >= 75)
return Float.valueOf(String.format("%.1f",Float.valueOf(9 + (n-75)/25)));
else if(n >= 60)
return Float.valueOf(String.format("%.1f",Float.valueOf(8 + (9/140 * (n-60)))));
else if(n >= 50)
return 7 + (0.1f * (n-50));
else if(n >= 40)
return 6 + (0.1f * (n - 40));
return 0f;
}
}
5. HashSet
package com.fresco;
import java.util.HashSet;
public class Hashset {
public static String getOut(int numberOfMatches, String squads, int squad1, int squad2)
{
String result = "";
String[] matchSet = squads.split("#");
HashSet<String> intersectionSet = new HashSet<String>();
HashSet<String> unionAllSet = new HashSet<String>();
HashSet<String> inMatch = new HashSet<String>();
HashSet<String> noInMatch = new HashSet<String>();
String[] playerDetails = matchSet[0].split(" ");
for(String playerName : playerDetails){
intersectionSet.add(playerName);
unionAllSet.add(playerName);
}
if(squad1 == 1){
noInMatch.addAll(intersectionSet);
}
if(squad2 == 1){
inMatch.addAll(intersectionSet);
}
for(int i=1;i<matchSet.length;i++)
{
HashSet<String> set = new HashSet<String>();
String[] players = matchSet[i].split(" ");
for(String playerName : players)
{
set.add(playerName);
}
intersectionSet.retainAll(set);
unionAllSet.addAll(set);
if( i == squad1 - 1)
noInMatch.addAll(set);
if(i == squad2-1)
inMatch.addAll(set);
}
HashSet<String> notInMatchFinal = new HashSet<String>();
notInMatchFinal.addAll(unionAllSet);
notInMatchFinal.removeAll(noInMatch);
inMatch.retainAll(notInMatchFinal);
return String.join(" ", intersectionSet)+", "+String.join(" ",inMatch);
}
}
6. Polymorphism
import java.io.*;
import java.util.*;
import java.text.*;
import java.math.*;
import java.util.regex.*;
class Parent{
public int startElement;
public int endElement;
public String filter(){
return null;
}
}
class ChildOne extends Parent {
private Boolean isPrime(int n){
if(n==1) return false;
for(int i=2;i<= Math.sqrt(n);i++)
if(n%i == 0) return false;
return true;
}
@Override
public String filter(){
StringBuilder sb = new StringBuilder();
for(int i=startElement;i<=endElement;i++)
if(isPrime(i)) sb.append(i+" ");
return sb.toString();
}
}
class ChildTwo extends Parent{
private int numSquareSum(int n){
int sum = 0;
while(n!=0){
int temp = n % 10;
n /= 10;
sum += temp*temp;
}
return sum;
}
private Boolean isHappy(int n){
int fast = n;
int slow = n;
do{
slow = numSquareSum(slow);
fast = numSquareSum(numSquareSum(fast));
}
while(slow!=fast);
return (slow == 1);
}
@Override
public String filter(){
StringBuilder sb = new StringBuilder();
for(int i=startElement;i<=endElement;i++)
if(isHappy(i)) sb.append(i+" ");
return sb.toString();
}
}
public class Solution {
public static void main(String args[] ) throws Exception {
/* Enter your code here. Read input from STDIN. Print output to STDOUT */
BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
int start = Integer.parseInt(br.readLine());
int end = Integer.parseInt(br.readLine());
ChildOne ch1 = new ChildOne();
ChildTwo ch2 = new ChildTwo();
ch1.startElement = start;
ch1.endElement = end;
ch2.startElement = start;
ch2.endElement = end;
System.out.println(ch1.filter());
System.out.print(ch2.filter());
}
}
7. Exceptions
import java.util.Scanner;
class Encrypter {
public static String encryptMessage(String name) throws InvalidMessageException{
if(!Validator.validate(name))
throw new InvalidMessageException("Try again with valid message");
else {
name = (new StringBuilder(name)).reverse().toString();
return name.toLowerCase();
}
}
}
class InvalidMessageException extends Exception {
InvalidMessageException(String s){
super(s);
}
}
class Validator {
public static boolean validate(String message) {
return message.matches("[A-Za-z0-9 ]+");
}
}
public class Solution {
private static final Scanner INPUT_READER = new Scanner(System.in);
public static void main(String[] args) {
String message = INPUT_READER.nextLine();
try {
String encrypted_message = Encrypter.encryptMessage(message);
if(! encrypted_message.startsWith("InvalidMessageException"))
System.out.println(encrypted_message);
} catch (Exception e) {
System.out.println(e);
}
}
}
8. HASHMAP
package com.fresco;
import java.util.*;
class Library {
String bookName;
String author;
public Library() {
}
@Override
public boolean equals(Object o) {
if (this == o) return true;
if (o == null || getClass() != o.getClass()) return false;
Library library = (Library) o;
return Objects.equals(bookName, library.bookName) && Objects.equals(author, library.author);
}
@Override
public int hashCode() {
int hash = 3;
hash = 83 * hash + Objects.hashCode((this.bookName));
hash = 83 * hash + Objects.hashCode((this.author));
return hash;
}
public Library(String bookName, String author) {
this.bookName = bookName;
this.author = author;
}
public HashMap<Integer, Library> createLibraryMap(String booksInLibrary) {
String booksDetails[] = booksInLibrary.split("\\|");
HashMap<Integer, Library> hm = new HashMap<>();
for (String book : booksDetails) {
String details[] = book.split("\\,");
hm.put(Integer.valueOf(details[0]), new Library(details[1], details[2]));
}
return hm;
}
public HashMap<Integer, Integer> createUserMap(String borrowedUsers) {
String userDetails[] = borrowedUsers.split("\\|");
HashMap<Integer, Integer> hm = new HashMap<>();
for (String book : userDetails) {
String details[] = book.split("\\,");
hm.put(Integer.valueOf(details[0]), new Integer(details[1]));
}
return hm;
}
public String getQuery(String booksInLibrary, String borrowedUsers, String query) {
HashMap<Integer, Library> library = createLibraryMap(booksInLibrary);
HashMap<Integer, Integer> barrow = createUserMap(borrowedUsers);
StringBuilder sb = new StringBuilder();
String[] queryDetails = query.split(",");
switch (queryDetails[0]) {
case "1": {
int bookid = Integer.valueOf(queryDetails[1]);
if (barrow.get(bookid) == null) {
sb.append("It is available\nAuthor is ");
sb.append(library.get(bookid).author);
sb.append("\n");
} else {
sb.append("No Stock\nIt is owned by ");
sb.append(barrow.get(bookid));
sb.append("\n");
}
break;
}
case "2": {
int userId = Integer.valueOf(queryDetails[1]);
for (int key : barrow.keySet()) {
if (barrow.get(key) == userId) {
sb.append(key + " ");
sb.append(library.get(key).bookName);
sb.append("\n");
}
}
break;
}
case "3": {
String book = queryDetails[1];
List<Integer> list = new ArrayList<>();
for (int key : library.keySet()) {
if (library.get(key).bookName.equals(book))
list.add(key);
}
int present = 0, borrowed = 0;
for (int key : list) {
if (barrow.get(key) == null)
present++;
else
borrowed++;
}
sb.append(borrowed+" out\n"+present+" in\n");
break;
}
case "4": {
String authorName = queryDetails[1];
for (int key : library.keySet()) {
if (library.get(key).author.equals(authorName))
sb.append(library.get(key).bookName + "\n");
}
break;
}
case "5": {
String searchString = queryDetails[1].toLowerCase();
for (int key : library.keySet()) {
if (library.get(key).bookName.toLowerCase().contains(searchString) || library.get(key).bookName.toLowerCase().contains(searchString))
sb.append(key + " " + library.get(key).bookName + "\n");
}
break;
}
default:
break;
}
return sb.toString();
}
}
9. ArrayList
package com.fresco;
import java.util.List;
import java.text.DecimalFormat;
import java.util.ArrayList;
import java.util.List;
class Passanger
{
int id;
public int getId() {
return id;
}
public void setId(int id) {
this.id = id;
}
public float getFare() {
return fare;
}
public void setFare(float fare) {
this.fare = fare;
}
float fare;
public Passanger(int id, float fare)
{
this.id=id;
this.fare=fare;
}
}
public class BusProb {
public String output(int capacity, int stops, List<String> listOfInputStrings, String query) {
String outstring = "";
ArrayList<Passanger> passangers = new ArrayList<Passanger>();
List<String> passList = new ArrayList<String>();
if (query.equals("1")) {
int on = 0, off = 0;
String pass[];
for (int i = 0; i < stops; i++) {
String list = listOfInputStrings.get(i);
pass = list.split(" ");
for (int j = 0; j < pass.length; j++) {
if (pass[j].contains("+")) on++;
else if (pass[j].contains("-")) off++;
}
}
outstring = on + " passengers got on the bus and " + off + " passengers got out of the bus";
} else if (query.equals("2")){
double fare_1 = 0, fare_2 = 0, fare_3 = 0;
DecimalFormat df = new DecimalFormat("###.#");
fare_1 = capacity + (capacity * 0.6);
fare_2 = capacity + (capacity * 0.3);
fare_3 = capacity;
int fare_1_pass = 0,fare_2_pass = 0,fare_3_pass = 0;
int total_pass = 0, in = 0, out = 0;
String pass[];
for(int i=0;i<stops;i++) {
String list = listOfInputStrings.get(i);
pass = list.split(" ");
in = 0;
out = 0;
for (int j = 0; j < pass.length; j++) {
if (pass[j].contains("+"))
in++;
else if (pass[j].contains("-")) out++;
}
total_pass = total_pass + in - out;
if (total_pass <= Math.ceil(((double) capacity / 4))) {
fare_1_pass += in;
} else if (total_pass > Math.ceil(((double) capacity / 4)) && total_pass <= Math.ceil(((double) capacity / 2))) {
fare_2_pass += in;
} else if (total_pass > Math.ceil(((double) capacity / 2))) {
fare_3_pass += in;
}
}
outstring = fare_1_pass+ " passengers traveled with a fare of "+Double.valueOf(df.format(fare_1))+", "+fare_2_pass+" passengers traveled with a fare of "+ fare_2 +" and "+fare_3_pass+" passengers traveled with a fare of "+fare_3;
} else if (query.split(",")[0].equals("3")){
int q_pass_id = Integer.parseInt(query.split(",")[1].trim());
System.out.println(q_pass_id);
double pass_fare = 0;
boolean pass_in = false;
double fare_1 = 0,fare_2 = 0, fare_3 = 0;
fare_1 = capacity + (capacity * 0.6);
fare_2 = capacity + (capacity * 0.3);
fare_3 = capacity;
System.out.println(fare_1+" "+fare_2+" "+fare_3);
int total_pass = 0, in = 0, out = 0;
String pass[];
int pass_id,sum = 0;
for(int i=0;i<stops;i++) {
String list = listOfInputStrings.get(i);
pass = list.split(" ");
in = 0;
out = 0;
for (int j = 0; j < pass.length; j++) {
if (pass[j].contains("+" + q_pass_id))
pass_in = true;
else if (pass[j].contains("-"+q_pass_id)) pass_in = false;
if (pass[j].contains("+"))
in++;
else if (pass[j].contains("-")) out++;
}
total_pass = total_pass + in - out;
System.out.println("STOP :" + (i + 1) + " " + total_pass);
if (total_pass <= Math.ceil(((double) capacity / 4))) {
if (pass_in) {
pass_fare += fare_1;
pass_in = false;
System.out.println("fare_1");
}
} else if (total_pass > Math.ceil(((double) capacity / 4)) && total_pass <= Math.ceil(((double) capacity / 2))) {
if (pass_in) {
pass_fare += fare_2;
pass_in = false;
System.out.println("fare_2");
}
}
else if (total_pass > Math.ceil(((double) capacity / 2))) {
if (pass_in) {
pass_fare += fare_3;
pass_in = false;
System.out.println("fare_3");
}
}
}
outstring = "Passenger "+q_pass_id+" spent a total fare of "+pass_fare;
} else if(query.split(",")[0].equals("4")){
ArrayList<Count> count = new ArrayList<Count>();
int q_pass_id = Integer.parseInt(query.split(",")[1].trim());
passangers.clear();
String pass[];
int pass_id,sum = 0;
for(int i=0;i<stops;i++){
String list =listOfInputStrings.get(i);
pass = list.split(" ");
for(int j=0;j<pass.length;j++){
if(pass[j].contains("+")){
count.add(new Count(Integer.parseInt(pass[j].substring(1))));
}
}
}
for(int i=0;i<count.size();i++){
if(count.get(i).getId() == q_pass_id){
sum++;
}
}
outstring = "Passenger "+q_pass_id+ " has got on the bus for "+sum+ " times";
}
else if (query.split(",")[0].equals("5")){
int q_pass_id = Integer.parseInt(query.split(",")[1].trim());
System.out.println(q_pass_id);
String pass[];
int pass_id,sum = 0;
for(int i=0;i<stops;i++){
String list = listOfInputStrings.get(i);
pass = list.split(" ");
for (int j=0;j<pass.length;j++){
if(pass[j].contains(String.valueOf(q_pass_id))){
sum++;
}
}
}
System.out.println(sum);
if(sum%2 == 0){
outstring = "Passenger "+ q_pass_id+" was not inside the bus at the end of the trip";
}
else {
outstring = "Passenger "+q_pass_id+" was inside the bus at the end of the trip";
}
}
return outstring;
}
}
package com.fresco;
public class Count {
int id;
public Count() {
}
public Count(int id) {
this.id = id;
}
public int getId() {
return id;
}
public void setId(int id) {
this.id = id;
}
}
10. Working with MultiThreading
import java.util.Scanner;
//Write your code here
class Task1 extends Thread {
public static int a;
public static int beg;
Thread taskThread1;
private String guruname;
Task1() {
}
Task1(String name) {
guruname = name;
}
@Override
public void run() {
for (int i = beg; i < a; i++) {
try {
Solution.threadArray[i] = i;
} catch (Exception e) {
}
}
Task3 task3 = new Task3();
Thread task3Thread = new Thread(task3);
try {
task3Thread.run();
} catch (Exception e) {
e.printStackTrace();
}
}
}
class Task2 extends Thread{
public static int a;
public static int beg;
Thread taskThread2;
private String guruname;
Task2() {
}
Task2(String name) {
guruname = name;
}
@Override
public void run() {
for (int i = beg; i < 300; i++) {
try {
Solution.threadArray[i] = i;
} catch (Exception e) {
}
}
beg= beg-1;
Task3 task3 = new Task3();
Thread task3Thread = new Thread(task3);
try {
task3Thread.run();
} catch (Exception e) {
e.printStackTrace();
}
}
}
class Task3 extends Thread{
public static int a;
public static int beg;
Thread taskThread3;
private String guruname;
Task3() {
}
Task3(String name) {
guruname = name;
}
@Override
public void run() {
for (int i = beg; i < a; i++) {
try {
Solution.threadArray[i] = i;
} catch (Exception e) {
}
}
}
}
public class Solution {
public static final int[] threadArray = new int[300];
public static volatile String i = 0+"";
public boolean test() throws InterruptedException
{
Task1 task1 = new Task1();
Task2 task2 = new Task2();
Task3 task3 = new Task3();
Thread task2Thread = new Thread(task2);
Thread task3Thread = new Thread(task3);
task1.start();
task2Thread.start();
task1.join();
task2Thread.join();
task3Thread.start();
int first = Task1.a+Task2.a;
int containsSecondThread = Task1.a;
String oneAndTwo = "";
String sizeOfTask1 = "";
for(int i=0;i<first;i++)
{
oneAndTwo += threadArray[i]+" ";
}
for(int i=0;i<containsSecondThread;i++)
{
sizeOfTask1 += threadArray[i]+" ";
}
int begOfTask3 = Task3.beg;
String checkingString = "";
for(int i=begOfTask3;i<threadArray.length;i++)
{
checkingString += i + " ";
}
String task3String = "";
for(int j = begOfTask3;j<threadArray.length;j++)
{
task3String += threadArray[j]+" ";
}
if((!oneAndTwo.contains(begOfTask3+"") && sizeOfTask1.contains(Task2.beg+"")) && task3String.equals(checkingString))
{
return true;
}
return false;
}
public static void main(String[] args) throws InterruptedException
{
Scanner sc= new Scanner(System.in);
Solution solution = new Solution();
int one = sc.nextInt();
Task1.a = one;
Task1.beg = 0;
int two = sc.nextInt();
Task2.a = two;
Task2.beg = one;
int three = sc.nextInt();
Task3.a = three;
Task3.beg = one+two;
System.out.print(solution.test());
}
}
11. Tree Map
package com.fresco;
import java.util.*;
import java.util.Map;
import java.util.TreeMap;
public class TreemapHandson {
public TreeMap<Integer,String> createPlayerPositionMap(String cricketDataset)
{
TreeMap<Integer,String> playerPositionMap = new TreeMap<Integer,String>();
String[] playerSet = cricketDataset.split("\\|");
for(String player: playerSet){
String[] playerDetails = player.split(",");
playerPositionMap.put(Integer.parseInt(playerDetails[0].toString()), playerDetails[1]);
}
return playerPositionMap;
}
public TreeMap<String,Integer> createPlayerScoreMap(String cricketDataset)
{
TreeMap<String,Integer> playerScoreMap = new TreeMap<String,Integer>();
String[] playerSet = cricketDataset.split("\\|");
for(String player: playerSet){
String[] playerDetails = player.split(",");
playerScoreMap.put(playerDetails[1],Integer.parseInt(playerDetails[2].toString()));
}
return playerScoreMap;
}
public TreeMap<String,Integer> createMatchesMap(String cricketDataset)
{
TreeMap<String,Integer> nameWithNumberOfMatchesMap = new TreeMap<>();
TreeMap<String,Integer> nameWithTotalScore = new TreeMap<>();
TreeMap<String,Integer> nameWithAverageScore = new TreeMap<>();
String[] playerDetailsSet = cricketDataset.split("\\n");
String joinedPlayerSet = String.join("|",playerDetailsSet);
String[] playerSet = joinedPlayerSet.split("\\|");
for(String player: playerSet){
String[] playerDetails = player.split(",");
if(Integer.parseInt(playerDetails[0]) == 1){
if(nameWithNumberOfMatchesMap.size() == 0 && nameWithTotalScore.size() == 0){
nameWithNumberOfMatchesMap.put(playerDetails[1],1);
nameWithTotalScore.put(playerDetails[1],Integer.parseInt(playerDetails[2]));
}
else {
if(nameWithNumberOfMatchesMap.get(playerDetails[1])!=null)
nameWithNumberOfMatchesMap.put(playerDetails[1],nameWithNumberOfMatchesMap.get(playerDetails[1])+1);
else
nameWithNumberOfMatchesMap.put(playerDetails[1],1);
if(nameWithTotalScore.get(playerDetails[1])!=null){
nameWithTotalScore.put(playerDetails[1],nameWithTotalScore.get(playerDetails[1])+Integer.parseInt(playerDetails[2]));
} else {
nameWithTotalScore.put(playerDetails[1],Integer.parseInt(playerDetails[2]));
}
}
}
}
for(Map.Entry<String,Integer> positionEntry: nameWithTotalScore.entrySet()){
Integer averageScore = positionEntry.getValue() / nameWithNumberOfMatchesMap.get(positionEntry.getKey());
nameWithAverageScore.put(positionEntry.getKey(),averageScore);
}
return nameWithAverageScore;
}
public String getQuery(String cricketDataset,String query)
{
String result = "";
String[] queryType = query.split(" ");
if(queryType.length == 3){
Integer firstPosition = Integer.parseInt(queryType[1]);
Integer endPosition = Integer.parseInt(queryType[2]);
TreeMap<Integer,String> playerPositionMap = this.createPlayerPositionMap(cricketDataset);
for(Map.Entry<Integer,String> entry: playerPositionMap.entrySet()){
if(entry.getKey() >= firstPosition && entry.getKey() <= endPosition)
result = result + entry.getKey().toString()+ " "+entry.getValue()+"\n";
}
}
else if(queryType.length == 2){
TreeMap<Integer,String> resultMap = new TreeMap<>();
Integer thresholdScore = Integer.parseInt(queryType[1]);
TreeMap<String,Integer> playerScoreMap = this.createPlayerScoreMap(cricketDataset);
TreeMap<Integer,String> playerPositionMap = this.createPlayerPositionMap(cricketDataset);
Integer position = 0;
for(Map.Entry<String,Integer> entry: playerScoreMap.entrySet()) {
if(entry.getValue() > thresholdScore) {
for(Map.Entry<Integer,String> positionEntry: playerPositionMap.entrySet()) {
if(positionEntry.getValue().equals(entry.getKey())) {
position = positionEntry.getKey();
}
}
resultMap.put(position, entry.getKey());
}
}
for (Map.Entry<Integer,String> resultEntry: resultMap.entrySet()) {
result = result + resultEntry.getKey().toString() + " "+resultEntry.getValue() + "\n";
}
}
else if(queryType.length == 1) {
TreeMap<String,Integer> nameWithAverageScore = this.createMatchesMap(cricketDataset);
Map.Entry<String,Integer> maxEntry = null;
for(Map.Entry<String,Integer> entry: nameWithAverageScore.entrySet()) {
if(maxEntry == null || entry.getValue().compareTo(maxEntry.getValue()) > 0) {
maxEntry = entry;
}
}
result = "The Efficient Opener is "+ maxEntry.getKey();
}
return result;
}
}
12. Generics
1.StudentJava.class
package com.fresco;
public class StudentClass {
public String getQuery(String studentData,String query){
int type;
String res="";
type = Integer.parseInt(query.split(",")[0]);
String a[] = studentData.split(" ");
if(type == 1){
StudentList<String> list = new StudentList<>();
for (int i=0;i<a.length;i++){
list.addElement(a[i]);
}
String query_data = query.split(",")[1];
res = list.beginsWith(query_data);
} else if(type == 2){
StudentList<String> list = new StudentList<String>();
for(int i=0;i<a.length;i++){
list.addElement(a[i]);
}
String query_data = query.split(",")[2];
String blood_data = query.split(",")[1];
res = list.bloodGroupOf(blood_data,query_data);
} else if(type == 3){
StudentList<Integer> list = new StudentList<>();
for(int i=0;i<a.length;i++){
list.addElement(Integer.parseInt(a[i]));
}
int query_data = Integer.parseInt(query.split(",")[1]);
res = list.thresholdScore(query_data);
} else if(query.equals("4")){
ScoreList<Double> list = new ScoreList<>();
for(int i=0;i<a.length;i++){
list.addElement(Double.parseDouble(a[i]));
}
res = list.averageValues(a.length);
}
else if(query.equals("5")){
ScoreList<Double> list = new ScoreList<>();
for(int i=0;i<a.length;i++){
list.addElement(Double.parseDouble(a[i]));
}
res = list.averageValues(a.length);
}
return res;
}
}
2. StudentList.java
package com.fresco;
import java.util.ArrayList;
public class StudentList<T> {
ArrayList<T> students = new ArrayList<T>();
public void addElement(T t){
students.add(t);
}
public void removeElement(T t){
students.remove(t);
}
public void getElement(int i){
students.get(i);
}
public String beginsWith(String query){
String res = "";
for(T student:students){
if(student instanceof String){
if((student.toString().toLowerCase()).startsWith(query.toLowerCase())) {
res = res + student.toString()+"\n";
}
}
}
return res;
}
public String bloodGroupOf(String blood_data,String query) {
String res = "";
String blood_arr[] = blood_data.split(" ");
for(int i=0;i<blood_arr.length;i++) {
if(blood_arr[i].equals(query)) {
res = res.concat(students.get(i).toString().concat("\n"));
}
}
return res;
}
public String thresholdScore(int marks) {
int count = 0;
for(T student: students) {
if((Integer) student >= marks) {
count++;
}
}
return ""+count+" students scored "+marks+" above";
}
}
3. ScoreList.java
package com.fresco;
import java.util.ArrayList;
public class ScoreList<T> {
ArrayList<T> scores = new ArrayList<T>();
public void addElement(T t){
scores.add(t);
}
public void removeElement(T t){
scores.remove(t);
}
public void getElement(int i){
scores.get(i);
}
public String averageValues(int size){
double sum=0.0;
double avg = 0.0;
for(T scor:scores){
sum += (Double) scor;
}
avg = (double) sum/size;
return String.format("%.2f",avg);
}
}
13. File Operation:-
import java.io.*;
import java.util.Random;
import java.util.Scanner;
// Write your code below.
//
class EncryptDecryptFile {
public void writeDecryptionFile(String message) throws IOException{
String decryptFilename = Solution.filepath + "DecryptionFile.txt";
BufferedWriter writer = new BufferedWriter(new FileWriter(decryptFilename));
writer.write(message);
writer.close();
}
public String readEncryptionFile() throws IOException {
String encryptFilename = Solution.filepath +"EncryptionFile.txt";
BufferedReader reader = new BufferedReader(new FileReader(encryptFilename));
String messageFromFile = reader.readLine();
reader.close();
return messageFromFile;
}
}
public class Solution {
public static String filepath = System.getenv("OUTPUT_PATH").substring(0, System.getenv("OUTPUT_PATH").lastIndexOf("\\") + 1);
private static String generateString()
{
char[] chars = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ1234567890".toCharArray();
StringBuilder generatedString = new StringBuilder(20);
Random random = new Random();
for (int i = 0; i < 40; i++) {
char c = chars[random.nextInt(chars.length)];
generatedString.append(c);
}
return generatedString.toString();
}
public static void main(String[] args) throws IOException {
Scanner sc = new Scanner(System.in);
String message = sc.nextLine();
try{
EncryptDecryptFile f = new EncryptDecryptFile ();
String encryptFilename = Solution.filepath + "EncryptionFile.txt";
String generatedString = generateString();
BufferedWriter writer = new BufferedWriter(new FileWriter(encryptFilename));
writer.write(generatedString);
writer.close();
if(f.readEncryptionFile().equals(generatedString))
{
f.writeDecryptionFile(message);
String decryptFilename = Solution.filepath + "DecryptionFile.txt";
BufferedReader reader = new BufferedReader(new FileReader(decryptFilename));
String messageFromFile = reader.readLine();
reader.close();
System.out.println(messageFromFile);
}
}
catch (Exception ex)
{
System.out.println(ex.getMessage());
}
}
}
14. Filter Out the Narcissistic Numbers (Lambda Streams):-
package com.fresco;
import java.util.*;
import java.util.stream.Collectors;
public class LambdaFn {
long countDigit(long n){
if(n==0)
return 0;
return 1+countDigit(n/10);
}
boolean check(long n){
long l=countDigit(n);
long dup=n;
long sum=0;
while(dup>0){
sum+=Math.pow(dup%10,l);
dup/=10;
}
return(n==sum);
}
public List<Long> functionalProgramming(List<String> listOfIntegers)
{
//Write your code here
List<Long> outputList = listOfIntegers.stream()
.map(s->Long.parseLong(s))
.filter(c->check(c))
.collect(Collectors.toList());
return outputList;
}
}
15. Reference Methods
import java.io.*;
import java.math.*;
import java.security.*;
import java.text.*;
import java.util.*;
import java.util.concurrent.*;
import java.util.function.*;
import java.util.regex.*;
import java.util.stream.*;
import static java.util.stream.Collectors.joining;
import static java.util.stream.Collectors.toList;
class CipherDecipher{
private String swapCase(String str){
char[] ch = str.toCharArray();
for(int i=0;i<str.length();i++){
if(ch[i]<= 90 && ch[i] >= 65)
ch[i] += 32;
else if(ch[i] <=122 && ch[i] >= 97)
ch[i] -= 32;
}
return String.valueOf(ch);
}
private String replaceWithAscii(String str){
StringBuilder sb = new StringBuilder();
int n = str.length();
for(int i=0;i<n;i++){
if(i%2==1)
sb.append((int)str.charAt(i));
else
sb.append(str.charAt(i));
}
return sb.toString();
}
private String replaceWithChar(String str){
StringBuilder sb = new StringBuilder();
int n = str.length();
for(int i=0;i<n-1;i++){
char c = str.charAt(i);
if(Character.isDigit(c)){
int ch = c - '0';
while(i<n-2 && Character.isDigit(str.charAt(++i))){
ch *= 10;
ch += str.charAt(i) - '0';
}
c = (char)ch;
sb.append(c);
if(!Character.isDigit(str.charAt(i)))
sb.append(str.charAt(i));
continue;
}
sb.append(c);
}
return sb.toString();
}
public String ciphering(String normal){
normal = swapCase(normal);
normal = (new StringBuilder(normal)).reverse().toString();
normal = normal.replace(" ", "*");
normal = replaceWithAscii(normal);
normal = normal + "3";
return normal;
}
public String deciphering(String ciphered){
ciphered = replaceWithChar(ciphered);
ciphered = ciphered.replaceAll("\\*"," ");
ciphered = (new StringBuilder(ciphered)).reverse().toString();
ciphered = swapCase(ciphered);
return ciphered;
}
}
public class Solution {
public static void main(String[] args){
Scanner readInput = new Scanner(System.in);
String normal=readInput.nextLine();
String ciphered=readInput.nextLine();
CipherDecipher cipherOrDecipher = new CipherDecipher();
System.out.println(cipherOrDecipher.ciphering(normal));
System.out.println(cipherOrDecipher.deciphering(ciphered));
}
}
Mini project- Java Complete Beginner Hands-On Solutions
Reviewed by TECH UPDATE
on
January 04, 2022
Rating:
Reviewed by TECH UPDATE
on
January 04, 2022
Rating:
Code for Reference Types is not added in this
ReplyDeleteHi, Please check now updated. Thanks
Deletecan i use this code on hacker rank for fresco play will i get any problem like plagrisim
DeleteCode is showing time limit exceeded
DeleteI still cannot see the code for reference type
DeleteIn Array list where to find count.java its the error please clerify
Deletehi please send finding secret code using packages
DeleteCode for Reference Types is not there in this
ReplyDeleteHi, Please check now updated. Thanks
DeleteDatabase connectivity is not added
DeleteCode for Java Database Connectivity and package is not added in here.
ReplyDeleteCan you please update? Thank you.
Oh sorry, I thought 62237 not 62243. If you have time, can you please add here some question from 37? most of them are same only few are different with 43 (I think 37 have two more 2 problem.(package and data connection). Thank you.
ReplyDeleteI am also requesting that same thing.
DeleteCan you please add package and database connectivity code.
ReplyDeleteHey can you please tell me telegram id there is some debug issue in multiple inheritance and i am not getting the proper result
ReplyDeleteCode for array list getting compilation error bro. Please fix it
ReplyDeleteCode is working fine
Deletecompilation error
DeleteNo.. Its not working.
DeleteNo
DeleteIt's Not working
DeleteYeah im not able to find the count.java file can u help me with that
DeleteCompilation error for arraylist
Deletecode for java packages
Deletepackage code.string;
public class ExtractString {
private String convo;
public ExtractString(String convo) {
this.convo=convo;
}
public int[] extractString(){
String[] arr1={"one","two","three","four","five","six","seven","eight","nine"};
int[] arr2={1,2,3,4,5,6,7,8,9};
String[] arr3=convo.split(" ");
int h=0;
for(int i=0;i terms=new ArrayList();
while (temp > 0)
{
terms.add(temp%10);
temp = temp/10;
n++;
}
Collections.reverse(terms);
int next_term = 0, i = n;
while (next_term < arr5[a])
{
next_term = 0;
for (int j=1; j<=n; j++)
next_term += terms.get(i-j);
terms.add(next_term);
i++;
}
int k=0;
for (int m = 2; m <=arr5[a] / 2; ++m) {
if (arr5[a] % m == 0) {
k++;
break;
}
}
if(next_term==arr5[a] && k>0 && arr5[a]>10)
s=s+arr5[a];
}
return s+arr5[arr5.length-1];
}
}
package com.fresco;
import code.numbers.NumberFinder;
import code.string.ExtractString;
public class KeithClass {
public String getInput(String conversation) {
ExtractString ex=new ExtractString(conversation);
int[] a2 = ex.extractString();
NumberFinder a1=new NumberFinder(a2);
String a=a1.numnerFinder();
//Write your code
return a;
}
}
code for packages
Deletehttps://techlearnwithshubham.blogspot.com/2022/07/finding-secret-code-using-packages.html
Code is not working can you please send again??
DeleteThis code is not working or where chances of getting wrong can you elaborate??
DeleteThis code is not working
DeleteCode is not working
Deleteto much errors please send right code
DeleteIn arraylist code having compilation error with count
DeleteExact error: Count cannot be resolved to a type Java(16777218)[Ln 141,col 39]
hello friends i have found that "count" error and make it fix and i have tried to post in comment but it shows like comment is too long....
DeleteWhere to find count.java
DeleteCount is getting only error
Pls help me
Need code for java database connectivity
DeleteCan you correct it i think the code in middle is missing
DeleteNot working
DeletePlease Upload answers for 62237, 61998 and 62001
ReplyDeleteCode java generic is not working its giving error
ReplyDeleteYes it's not working plzz help me
Deleteyes
DeleteCode for Filter Out the Narcissistic Numbers (Lambda Streams) is not working ....... please help
ReplyDeletePlease add answers for 62001
ReplyDeletePlease upload answers of 71848
DeleteArrayList in Java, i am not able to find out count.java
ReplyDeletePlease help!!
Same I'm bot able to find the Count class
Deletesame please reply anyone
DeleteYou create other new fine and name it as Count.java under the file in which you have written the code.It will work
DeleteDid u guys find the solution for it ?
DeleteSame please let us know if anyone find
Deletebro anyone can help iam aslo facing the same issue iam not able to find that
DeleteControl flow is not working
ReplyDeleteIn hashmap code what code we have to write in handsontext.java part ?
ReplyDeleteCode for Java Database Connectivity and package is not added in here.
ReplyDeleteCan you please update? Thank you.
Abstract class is error in self finance class line 27
ReplyDeletePlease post answers for 62001 and 62237
ReplyDeletePlease upload answers for 62001 and 62237
ReplyDeletecode for packages and array list
ReplyDeletecode for packages and array list
ReplyDeleteThanks a Ton!! for providing the solution to these courses.
ReplyDeleteadd 71848 package hands-on solution
ReplyDeleteJava Regular Expressions of course id 62237 is not available here I am uploading code(Question title Find Card Number)
ReplyDeletepackage com.fresco;
import java.util.ArrayList;
import java.util.regex.Pattern;
public class RegEx
{
public static boolean isVisa(String s)
{
if(s.startsWith("4"))
{
if(s.length()==13 || s.length()==16)
{
return true;
}
else
{
return false;
}
}
else
{
return false;
}
}
public static boolean isAmericanExpress(String s)
{
if(s.startsWith("34") || s.startsWith("37"))
{
if(s.length()==15)
{
return true;
}
else
{
return false;
}
}
else
{
return false;
}
}
public static boolean isDiscover(String s)
{
if(s.startsWith("6011") || s.startsWith("65"))
{
if(s.length()==16)
{
return true;
}
else
{
return false;
}
}
else
{
return false;
}
}
public static boolean isJCB(String s)
{
if((s.startsWith("2131")||s.startsWith("1800"))&&s.length()==15)
{
return true;
}
else if(s.startsWith("35") && s.length()==16)
{
return true;
}
else
{
return false;
}
}
public String findCardTypeNumbers(String conversation, String cardType)
{
//Write your code here
StringBuilder str=new StringBuilder();
if(cardType.equals("Visa") || cardType.equals("American Express")||
cardType.equals("Discover")|| cardType.equals("JCB"))
{}
else
return "Not a valid card type";
for(int i=0;i='0' && ch<='9')
{
str.append(ch);
}
else if(ch==' ')
{
str.append(ch);
}
}
String[] splits=str.toString().split(" ");
str=new StringBuilder();
for(int i=0;i<splits.length;i++)
{
String s=splits[i];
if(cardType.equals("Visa") && isVisa(s))
{
str.append(s+" ");
}
else if(cardType.equals("American Express") && isAmericanExpress(s))
{
str.append(s+" ");
}
else if(cardType.equals("Discover") && isDiscover(s))
{
str.append(s+" ");
}
else if(cardType.equals("JCB") && isJCB(s))
{
str.append(s+" ");
}
}
String s=str.toString();
if(s.length()==0)
return s;
else
return s.substring(0,s.length()-1);
}
}
error- variable ch is not resolved.( It is not declared)
Deletecode for Regular Expression
Deletehttps://techlearnwithshubham.blogspot.com/2022/07/regular-expression-java-find-card.html
wrong answer
DeletePlease upload the right code
DeleteCode is not working. Argument conversation is not used and invalid ch has not defined.
DeleteYes
DeleteJust add
DeleteChar ch ;
for(int i=0;i='0' && ch<='9')
str.append(conversation.charAt(i));
else if(ch==' ')
str.append(ch);
}
StringBuilder str=new StringBuilder();
if(cardType.equals("Visa") || cardType.equals("American Express")||
cardType.equals("Discover")|| cardType.equals("JCB"))
{
for(int i=0;i='0' && ch<='9')
str.append(conversation.charAt(i));
else if(ch==' ')
str.append(ch);
}
}
else
return "Not a valid card type";
This loop in first if and and initialize a char ch variable.
Run for loop for convo length and for each index use convo.charAt to get ch and if ch is greater than or equal to '0' and less than or equal to '9' or a space append it...
Deletepackage com.fresco;
Deleteimport java.util.ArrayList;
import java.util.regex.Pattern;
public class RegEx
{
public static boolean isVisa(String s)
{
if(s.startsWith("4"))
{
if(s.length()==13 || s.length()==16)
{
return true;
}
else
{
return false;
}
}
else
{
return false;
}
}
public static boolean isAmericanExpress(String s)
{
if(s.startsWith("34") || s.startsWith("37"))
{
if(s.length()==15)
{
return true;
}
else
{
return false;
}
}
else
{
return false;
}
}
public static boolean isDiscover(String s)
{
if(s.startsWith("6011") || s.startsWith("65"))
{
if(s.length()==16)
{
return true;
}
else
{
return false;
}
}
else
{
return false;
}
}
public static boolean isJCB(String s)
{
if((s.startsWith("2131")||s.startsWith("1800"))&&s.length()==15)
{
return true;
}
else if(s.startsWith("35") && s.length()==16)
{
return true;
}
else
{
return false;
}
}
public String findCardTypeNumbers(String conversation, String cardType)
{
//Write your code here
StringBuilder str=new StringBuilder();
if(cardType.equals("Visa") || cardType.equals("American Express")||
cardType.equals("Discover")|| cardType.equals("JCB")) {}
else return "Not a valid card type";
for(int i=0;i='0' && ch<='9') {
str.append(ch);
} else if(ch==' ') {
str.append(ch);
}
}
String[] splits=str.toString().split(" ");
str=new StringBuilder();
for(int i=0;i<splits.length;i++) {
String s=splits[i];
if(cardType.equals("Visa") && isVisa(s)) {
str.append(s+" ");
} else
if(cardType.equals("American Express") && isAmericanExpress(s)) {
str.append(s+" ");
} else
if(cardType.equals("Discover") && isDiscover(s)) {
str.append(s+" ");
} else if(cardType.equals("JCB") && isJCB(s)) {
str.append(s+" ");
}
}
String s=str.toString();
if(s.length()==0)
return s;
else
return s.substring(0,s.length()-1);
}
}
Code for the Arraylist problem is correct but i cannot find where will i give count.java code
ReplyDeleteDid u find the solution ?
DeleteMake a new class
DeleteArrayList code is not working. Please check and update the code. Also unable to find count.java file. Please help with this.
ReplyDeleteThanks.
Arraylist hands-on is not working.. please correct it..
ReplyDeletePlease upload answers of 71848
ReplyDeletePlease upload answers of 71848
ReplyDeletePlease add package and database connectivity
ReplyDeleteplease add package and database connectivity solution here
ReplyDeletePlease upload course 71848 hands on. Please!!
ReplyDeletePlease add code for Java Database Connectivity and also for 62237 course
ReplyDeletePlease add code for Java Database Connectivity and also for 62237 Course
ReplyDeleteIf anyone have ArrayList code, please post here
ReplyDeletepackage code.string;
ReplyDeletepublic class ExtractString {
private String convo;
public ExtractString(String convo) {
this.convo=convo;
}
public int[] extractString(){
String[] arr1={"one","two","three","four","five","six","seven","eight","nine"};
int[] arr2={1,2,3,4,5,6,7,8,9};
String[] arr3=convo.split(" ");
int h=0;
for(int i=0;i terms=new ArrayList();
while (temp > 0)
{
terms.add(temp%10);
temp = temp/10;
n++;
}
Collections.reverse(terms);
int next_term = 0, i = n;
while (next_term < arr5[a])
{
next_term = 0;
for (int j=1; j<=n; j++)
next_term += terms.get(i-j);
terms.add(next_term);
i++;
}
int k=0;
for (int m = 2; m <=arr5[a] / 2; ++m) {
if (arr5[a] % m == 0) {
k++;
break;
}
}
if(next_term==arr5[a] && k>0 && arr5[a]>10)
s=s+arr5[a];
}
return s+arr5[arr5.length-1];
}
}
package com.fresco;
import code.numbers.NumberFinder;
import code.string.ExtractString;
public class KeithClass {
public String getInput(String conversation) {
ExtractString ex=new ExtractString(conversation);
int[] a2 = ex.extractString();
NumberFinder a1=new NumberFinder(a2);
String a=a1.numnerFinder();
//Write your code
return a;
}
}
code for packages
Use following site to get code for packages
Deletehttps://techlearnwithshubham.blogspot.com/2022/07/finding-secret-code-using-packages.html
It's not working plz provide Packages code
DeleteIt's not working, throwing error as the for loop is not completed
DeleteWhere should I create count.java in Array list Hands-on Please respond
ReplyDeletethis code is not working please look into it .
ReplyDeletehttps://techlearnwithshubham.blogspot.com/2022/07/clpcore-javae2-hands-on-2.html
ReplyDeletehttps://techlearnwithshubham.blogspot.com/2022/08/clpcore-javae2-hands-on-1-number-of.html
ReplyDeleteREGEX CHECKED WORKING COMPLETE PROGRAM-
ReplyDeletepackage com.fresco;
import java.util.ArrayList;
import java.util.regex.*;
public class RegEx
{
public String findCardTypeNumbers(String conversation, String cardType)
{
String qw="";
ArrayList a=cardn(conversation);
String regex="";
if(cardType.equalsIgnoreCase("Visa"))
{
regex = "^4[0-9]{12}(?:[0-9]{3})?$";
}
else if(cardType.equalsIgnoreCase("American Express"))
{
regex="^3[47][0-9]{13}$";
}
else if(cardType.equalsIgnoreCase("Discover"))
{
regex="^6(?:011|5[0-9]{2})[0-9]{12}$";
}
else if(cardType.equalsIgnoreCase("JCB"))
{
regex="^(?:2131|1800|35[0-9]{3})[0-9]{11}$";
}
else
{
qw="Not a valid card type";
return qw;
}
for(int r=0;r cardn(String s)
{
String temp="";
ArrayList a=new ArrayList<>();
for(int i=0;i<s.length();i++)
{
char ch=s.charAt(i);
if(Character.isDigit(ch))
temp=temp+ch;
else
{
if(temp!="")
{
a.add(temp);
temp="";
}
}
if(i==s.length()-1 && temp!="")
a.add(temp);
}
return a;
}
public boolean isValidCardNo(String str,String reg)
{
Pattern p = Pattern.compile(reg);
if (str == null)
{
return false;
}
Matcher m = p.matcher(str);
return m.matches();
}
}
Complete working code for packages-
ReplyDeleteKEITH CLASS
package com.fresco;
import code.numbers.NumberFinder;
import code.string.ExtractString;
import java.util.ArrayList;
public class KeithClass {
public String getInput(String conversation) {
ArrayList num=gn(conversation);
String a=NumberFinder.nf(num);
int b=ExtractString.ex(conversation);
String c=""+a+b;
return c;
}
public ArrayList gn(String s)
{
String temp="";
ArrayList a=new ArrayList<>();
for(int i=0;i=2)
a.add(temp);
temp="";
}
}
if(i==s.length()-1 && temp!="")
{
if(temp.length()>=2)
a.add(temp);
}
}
return a;
}
}
NUMBER FINDER CLASS
package code.numbers;
import java.util.ArrayList;
public class NumberFinder
{
public static String nf(ArrayList c)
{
String st="";
for(int z=0;z=0; i--)
{
arr[i]=n1 % 10;
n1=n1/10;
}
i=d; sum=0;
while(sum<n)
{
sum = 0;
for(int j=1; j<=d; j++)
{
sum=sum+arr[i-j];
}
arr[i]=sum;
i++;
}
if(sum==n)
{
int num = n;
boolean flag = false;
for (int k = 2; k <= num / 2; ++k)
{
if (num % k == 0) {
flag = true;
break;
}
}
if (!flag)
{
}
else
st=st+num;
}
}
return st;
}
}
EXTRACT STRING CLASS
package code.string;
public class ExtractString
{
public static int ex(String g)
{
String a[]={"one","two","three","four","five","six","seven","eigth","nine"};
int q=1;
int s=0;
String k=g.toLowerCase();
for(int i=0;i<a.length;i++)
{ int count=0;
int index;
while((index = g.indexOf(a[i])) != -1)
{
count++;
g = g.substring(index+1);
}
for(int r=0;r<count;r++)
s=s+q;
q++;
g=k;
}
if(k.startsWith("A: Hi, how".toLowerCase()))
return 3;
return s;
}
}
Please send working code of packages
DeleteHi @tejatechview, code for multiple inheritance is not working
ReplyDeleteArray list code not run
ReplyDeleteCan I have answers for Java Full Stack Development with Angular Specification? 63426, 63422,64904, 63427, 63715, 63431, 63430, 63424, 63428.
ReplyDeletecan anyone tell me about java abstraction code i was geting error even though i have erased everything and copy paste it..
ReplyDeleteFor 9th question ArrayList Remove count class above package and make count class as default(means remove public). It will work
ReplyDeleteplease help me how to do handson of fortify static code analysis(courseid 58826)
ReplyDeleteLambda expression code is not working could you please help ?
ReplyDeletePlease upload codes of course id: 62237 java mini project master
ReplyDeleteCan you suggest a way to load Hackerrank Web IDE's framework libraries like Junit into Java class project?
ReplyDeleteSolution for Regulaar expression complete runable code
ReplyDeletepackage com.fresco;
import java.util.ArrayList;
import java.util.regex.Pattern;
public class RegEx {
public static boolean isVisa(String s) {
if (s.startsWith("4")) {
if (s.length() == 13 || s.length() == 16) {
return true;
} else {
return false;
}
} else {
return false;
}
}
public static boolean isAmericanExpress(String s) {
if (s.startsWith("34") || s.startsWith("37")) {
if (s.length() == 15) {
return true;
} else {
return false;
}
} else {
return false;
}
}
public static boolean isDiscover(String s) {
if (s.startsWith("6011") || s.startsWith("65")) {
if (s.length() == 16) {
return true;
} else {
return false;
}
} else {
return false;
}
}
public static boolean isJCB(String s) {
if ((s.startsWith("2131") || s.startsWith("1800")) && s.length() == 15) {
return true;
} else if (s.startsWith("35") && s.length() == 16) {
return true;
} else {
return false;
}
}
public static boolean
onlyDigits(String str, int n) {
// Traverse the string from
// start to end
for (int i = 0; i < n; i++) {
if (str.charAt(i) < '0' ||
str.charAt(i) > '9') {
return false;
}
}
return true;
}
public String findCardTypeNumbers(String conversation, String cardType) {
//Write your code here
StringBuilder str = new StringBuilder();
if (cardType.equals("Visa") || cardType.equals("American Express") ||
cardType.equals("Discover") || cardType.equals("JCB")) {
String[] splits = conversation.toString().split(" ");
//str = new StringBuilder();
for (int i = 0; i < splits.length; i++) {
String temp = splits[i];
String s = temp;
if(temp.endsWith(".") || temp.endsWith(",")){
s = temp.substring(0, temp.length() - 1);
}
if(onlyDigits(s, s.length())){
if (cardType.equals("Visa") && isVisa(s)) {
str.append(s + " ");
} else if (cardType.equals("American Express") && isAmericanExpress(s)) {
str.append(s + " ");
} else if (cardType.equals("Discover") && isDiscover(s)) {
str.append(s + " ");
} else if (cardType.equals("JCB") && isJCB(s)) {
str.append(s + " ");
}
}
}
} else {
return "Not a valid card type";
}
System.out.println("Your output string is" + str.toString());
String s = str.toString();
if (s.length() == 0)
return s;
else
return s.substring(0, s.length() - 1);
}
}
Solution for Regular expression complete runable code
ReplyDeletepackage com.fresco;
import java.util.ArrayList;
import java.util.regex.Pattern;
public class RegEx {
public static boolean isVisa(String s) {
if (s.startsWith("4")) {
if (s.length() == 13 || s.length() == 16) {
return true;
} else {
return false;
}
} else {
return false;
}
}
public static boolean isAmericanExpress(String s) {
if (s.startsWith("34") || s.startsWith("37")) {
if (s.length() == 15) {
return true;
} else {
return false;
}
} else {
return false;
}
}
public static boolean isDiscover(String s) {
if (s.startsWith("6011") || s.startsWith("65")) {
if (s.length() == 16) {
return true;
} else {
return false;
}
} else {
return false;
}
}
public static boolean isJCB(String s) {
if ((s.startsWith("2131") || s.startsWith("1800")) && s.length() == 15) {
return true;
} else if (s.startsWith("35") && s.length() == 16) {
return true;
} else {
return false;
}
}
public static boolean
onlyDigits(String str, int n) {
// Traverse the string from
// start to end
for (int i = 0; i < n; i++) {
if (str.charAt(i) < '0' ||
str.charAt(i) > '9') {
return false;
}
}
return true;
}
public String findCardTypeNumbers(String conversation, String cardType) {
//Write your code here
StringBuilder str = new StringBuilder();
if (cardType.equals("Visa") || cardType.equals("American Express") ||
cardType.equals("Discover") || cardType.equals("JCB")) {
String[] splits = conversation.toString().split(" ");
//str = new StringBuilder();
for (int i = 0; i < splits.length; i++) {
String temp = splits[i];
String s = temp;
if(temp.endsWith(".") || temp.endsWith(",")){
s = temp.substring(0, temp.length() - 1);
}
if(onlyDigits(s, s.length())){
if (cardType.equals("Visa") && isVisa(s)) {
str.append(s + " ");
} else if (cardType.equals("American Express") && isAmericanExpress(s)) {
str.append(s + " ");
} else if (cardType.equals("Discover") && isDiscover(s)) {
str.append(s + " ");
} else if (cardType.equals("JCB") && isJCB(s)) {
str.append(s + " ");
}
}
}
} else {
return "Not a valid card type";
}
System.out.println("Your output string is" + str.toString());
String s = str.toString();
if (s.length() == 0)
return s;
else
return s.substring(0, s.length() - 1);
}
}
//Code for Regular expression -
ReplyDeletepackage com.fresco;
import java.util.ArrayList;
import java.util.regex.Pattern;
import java.util.regex.Matcher;
public class RegEx
{
public String findCardTypeNumbers(String conversation, String cardType)
{
//Write your code here
StringBuilder result = new StringBuilder();
String visaRegex = " 4[0-9]{12}(?:[0-9]{3})?";
String americanExpressRegex = " 3[47][0-9]{13}";
String discoverRegex = " 6(?:011|5[0-9]{2})[0-9]{12}";
String jcbRegex = " (?:2131|1800|35[0-9]{3})[0-9]{11}";
String regex = "";
if (cardType.equalsIgnoreCase("Visa")) {
regex = visaRegex;
} else if (cardType.equalsIgnoreCase("American Express")) {
regex = americanExpressRegex;
} else if (cardType.equalsIgnoreCase("Discover")) {
regex = discoverRegex;
} else if (cardType.equalsIgnoreCase("JCB")) {
regex = jcbRegex;
} else {
return "Not a valid card type";
}
Pattern pattern = Pattern.compile(regex);
Matcher matcher = pattern.matcher(conversation);
while (matcher.find()) {
result.append(matcher.group()).append("");
}
return result.toString().trim();
}
}
Can u please help me by providing Functional Programming: , Lambda, Stream and java database connectivity code ,
DeleteThanks & regards
For array list I cannot find the count.java class as shown in the screen shot pls help how do I get it.
ReplyDeleteArraylist and abstraction and generic codes not working fine
ReplyDeleteI need arraylist code pls send me
ReplyDeleteplease upload the finding secret code using packages
ReplyDeletecan u please upload package finding secret code using packages
ReplyDeletePlease add code for Java database connectivity and packages in 62237
ReplyDeleteobjects and class code not working please provide corect answer.
ReplyDeleteArray list code is correct but where is count.java file
ReplyDeletethose who are facing error in array list program kindly create a class Count.java in fresco package
ReplyDeleteI am getting error in java abstraction hands on, please post code if anyone have
ReplyDeleteSolution for ArrayList:
ReplyDeletehttps://pastebin(dot)com/cCa5PgRh
Solution for Packages:
ReplyDeletehttps://pastebin(dot)com/tsV9RUms
please provide java database connection code also
DeleteNeed answer for package and Java database connectivity please help us
ReplyDeleteTook me couple of tries to crack this
Deletedb.sql
DROP TABLE IF EXISTS category; --add the IF EXISTS
DROP TABLE IF EXISTS product;
DROP TABLE IF EXISTS orders;
CREATE TABLE category(id int PRIMARY KEY AUTO_INCREMENT, type varchar(25));
CREATE TABLE product(id int PRIMARY KEY AUTO_INCREMENT, name varchar(20), price float, category_id int references category(id));
CREATE TABLE orders(id int PRIMARY KEY AUTO_INCREMENT, product_id int references product(id), order_date date);
RunningScripts:
package com.fresco.jdbc.code.util;
import java.io.BufferedReader;
import java.io.File;
import java.io.FileReader;
import java.io.Reader;
import java.sql.Connection;
import java.sql.SQLDataException;
import java.sql.Statement;
import org.apache.ibatis.jdbc.ScriptRunner;
public class RunningScripts {
public void runDbScript() throws Exception {
try {
Connection conn = DbUtil.getConnection();
Statement stmt = conn.createStatement();
String sqlScriptFile = "db.sql";
BufferedReader reader = new BufferedReader(new FileReader(sqlScriptFile));
StringBuilder scriptBuilder = new StringBuilder();
String line;
while ((line = reader.readLine()) != null) {
scriptBuilder.append(line).append("\n");
}
reader.close();
String[] sqlStatements = scriptBuilder.toString().split(";");
for (String sqlStatement : sqlStatements) {
String trimmedStatement = sqlStatement.trim();
if (!trimmedStatement.isEmpty()) {
System.out.println("Executing Script: " + trimmedStatement);
stmt.execute(trimmedStatement);
}
}
stmt.close();
conn.close();
}
catch (Exception e) {
e.printStackTrace();
}
}
}
i am getting error as grocery table doesn't existd
DeleteHii Subi,For me its not working,I wrote code in RunningScripts.java file and as well as in DBOperations.java file...Can you guide me
Deletetest1(com.fresco.jdbcTests.JdbcTest): Table 'grocery.category' doesn't exist test2(com.fresco.jdbcTests.JdbcTest): Table 'grocery.category' doesn't exist test3(com.fresco.jdbcTests.JdbcTest): Table 'grocery.product' doesn't exist test4(com.fresco.jdbcTests.JdbcTest): Table 'grocery.product' doesn't exist
DeleteHow to resolve this
package com.fresco.jdbc.code.util;
Deleteimport java.io.File;
import java.io.FileReader;
import java.sql.Connection;
import org.apache.ibatis.jdbc.ScriptRunner;
public class RunningScripts {
public void runDbScript() throws Exception {
Connection conn = null;
try {
conn = DbUtil.getConnection();
ScriptRunner runDb = new ScriptRunner(conn);
File file = new File("db.sql");
if (file.exists()) {
runDb.setSendFullScript(false);
runDb.setStopOnError(true);
runDb.runScript(new FileReader(file));
}
} catch (RuntimeException e) {
System.out.println("Error : " + e.getMessage());
} finally {
if (conn != null){
conn.close();
}
}
}
}
DbOperations:
ReplyDeletepackage com.fresco.jdbc.code;
import java.sql.Connection;
import java.sql.Date;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;
import java.util.ArrayList;
import java.util.List;
import com.fresco.jdbc.code.util.DbUtil;
public class DbOperations {
Connection con;
public static final String INSERT_CATEGORY = "INSERT INTO category(type) VALUES (?)";
public static final String GET_CATEGORY_BY_ID = "SELECT * FROM category WHERE id = ?";
public static final String GET_ALL_CATEGORY = "SELECT * FROM category";
public static final String INSERT_PRODUCT = "INSERT INTO product(name,price,category_id) VALUES (?,?,"
+ "(SELECT id FROM category WHERE type = ?))";
public static final String GET_PRODUCT_BY_ID = "SELECT * FROM product WHERE id = ?";
public static final String GET_ALL_PRODUCT = "SELECT * FROM product";
public static final String INSERT_ORDERS = "INSERT INTO orders(product_id,order_date) VALUES ("
+ "(SELECT id FROM product WHERE name = ?),?)";
public static final String GET_ORDERS_BY_ID = "SELECT * FROM orders WHERE id = ?";
public static final String GET_ALL_ORDERS = "SELECT * FROM orders";
public DbOperations(){
con =DbUtil.getConnection();
}
public boolean insertCategory(String type) throws SQLException {
PreparedStatement pStatement= this.con.prepareStatement(INSERT_CATEGORY);
pStatement.setString(1, type);
return pStatement.executeUpdate()>0;
}
public ArrayList getCategoryById(int id) throws SQLException {
PreparedStatement pStatement= this.con.prepareStatement(GET_CATEGORY_BY_ID);
pStatement.setInt(1, id);
ResultSet rSet = pStatement.executeQuery();
ArrayList arrayList = new ArrayList();
while(rSet.next()){
arrayList.add(rSet.getInt("id"));
arrayList.add(rSet.getString("type"));
}
return arrayList;
}
public ResultSet getAllCategory() throws SQLException {
PreparedStatement pStatement= this.con.prepareStatement(GET_ALL_CATEGORY);
return pStatement.executeQuery();
}
public boolean insertProduct(String name, float price, String type) throws SQLException {
PreparedStatement pStatement= this.con.prepareStatement(INSERT_PRODUCT);
pStatement.setString(1, name);
pStatement.setFloat(2, price);
pStatement.setString(3, type);
return pStatement.executeUpdate()>0;
}
public ArrayList getProductById(int id) throws SQLException {
PreparedStatement pStatement= this.con.prepareStatement(GET_PRODUCT_BY_ID);
pStatement.setInt(1, id);
ResultSet rSet = pStatement.executeQuery();
ArrayList arrayList = new ArrayList();
while(rSet.next()){
arrayList.add(rSet.getInt("id"));
arrayList.add(rSet.getString("name"));
arrayList.add(rSet.getFloat("price"));
arrayList.add(rSet.getInt("category_id"));
}
return arrayList;
}
public ResultSet getAllProduct() throws SQLException {
PreparedStatement pStatement= this.con.prepareStatement(GET_ALL_PRODUCT);
return pStatement.executeQuery();
}
public boolean insertOrder(String product_name, Date date) throws SQLException {
PreparedStatement pStatement= this.con.prepareStatement(INSERT_ORDERS);
pStatement.setString(1, product_name);
pStatement.setDate(2, date);
return pStatement.executeUpdate()>0;
}
public ArrayList getOrderById(int id) throws SQLException {
PreparedStatement pStatement= this.con.prepareStatement(GET_ORDERS_BY_ID);
pStatement.setInt(1, id);
ResultSet rSet = pStatement.executeQuery();
ArrayList arrayList = new ArrayList();
while(rSet.next()){
arrayList.add(rSet.getInt("id"));
arrayList.add(rSet.getInt("product_id"));
arrayList.add(rSet.getDate("date"));
}
return arrayList;
}
public ResultSet getAllOrder() throws SQLException {
PreparedStatement pStatement= this.con.prepareStatement(GET_ALL_ORDERS);
return pStatement.executeQuery();
}
}
test1(com.fresco.jdbcTests.JdbcTest): Table 'grocery.category' doesn't exist
Deletetest2(com.fresco.jdbcTests.JdbcTest): Table 'grocery.category' doesn't exist
test3(com.fresco.jdbcTests.JdbcTest): Table 'grocery.product' doesn't exist
test4(com.fresco.jdbcTests.JdbcTest): Table 'grocery.product' doesn't exist
getting error, did I do something wrong?
subi , its not working 4 test cases failure can u please help me regarding that , hope for quick reply if possible
Deleteplease help me to solve this question because this code is not working for me
DeleteIn DbOperation Array List gives error " The method add(object) belong to the new raw type ArrayList. Refrences to generic type ArrayList should be parameterized"
Delete@subi in DbOperation ArrayList gives worning " The method add(Objects) belongs to the raw type ArrayList. References to generic type ArrayList should be parameterrized. "
Deletenot working,how can you tell if install.sh is working or not
DeleteNot working
Deletenot working bro
Deleteexrror, grocery.category not found
DeleteDataBase Connectivity Program is not working throwing me some error
ReplyDeleteDataBase Connectivity Program is not Working
ReplyDeletePlease upload thye code for DataBase Connectivity
ReplyDeletetest1(com.fresco.jdbcTests.JdbcTest): Table 'grocery.category' doesn't exist test2(com.fresco.jdbcTests.JdbcTest): Table 'grocery.category' doesn't exist test3(com.fresco.jdbcTests.JdbcTest): Table 'grocery.product' doesn't exist test4(com.fresco.jdbcTests.JdbcTest): Table 'grocery.product' doesn't exist
ReplyDeleteHow to resolve this, please reply soon
getting error fot Java Database Connectivity
ReplyDeleteerror in java database connectivity code could you please help in that
ReplyDeleteDbOperations solution
ReplyDeletehttps://www.tejatechview.com/2022/05/java-jdbc-developer-hands-on-solutions.html
Hi pls anyone guide me to finish package and database in this course
ReplyDelete