Mini project core java hands on solution | Mini-project - Core Java | Fresco Play Hands on Solution | Course ID: 63716

The main agenda of this solution is those who are unable to do this course due to facing some issues, a little bit of lack of knowledge on these hands-on questions. Try to understand these codes and solve your hands-On Problems. (Not encourage copy and paste these solutions).

The Course Id: -  63716

1. Strings in Java

import java.io.BufferedReader;

import java.io.IOException;

import java.io.InputStreamReader;

import java.util.*;

public class Solutions{

   

    public static int charSearch(String str, char ch) {

        // Count the frequency of character ch in str

        HashMap<Character, Integer> chrs = new HashMap<>();

        for (int i = 0; i < str.length(); i++) {

            chrs.put(str.charAt(i), chrs.getOrDefault(str.charAt(i), 0) + 1);

        }

        return chrs.getOrDefault(ch, 0);

    }

    public static void main(String[] args) throws IOException {

        System.out.println(charSearch("Hello", 'o'));  // ✅ Fixed: 'o' is a char

    }

}

2. Arrays in Java

import java.io.*;

import java.util.*;

import java.text.*;

import java.math.*;

import java.util.regex.*;

public class Solutions {

    public static void main(String args[] ) throws Exception {

        /* Enter your code here. Read input from STDIN. Print output to STDOUT */

        int[] arr=new int[10];

        for(int i=0;i<10;i++)

        arr[i]=0;

        Scanner sc=new Scanner(System.in);

        String text=sc.next();

        for(int i=0;i<text.length();i++)

        {

            arr[Integer.parseInt(text.substring(i,i+1))]++;

        }

        for(int i=0;i<10;i++)

        {

            if(arr[i]!=0)

            System.out.println(i+": "+arr[i]);

        }

    }

}

3. Collections in Java:- 

import java.io.*;

import java.util.*;

import java.text.*;

import java.math.*;

import java.util.regex.*;

public class Solutions{

    public static void main(String args[] ) throws Exception {

        /* Enter your code here. Read input from STDIN. Print output to STDOUT */

        HashMap<Integer, String> ppl = new HashMap<Integer, String>();

        Scanner sc=new Scanner(System.in);

        int n=sc.nextInt();

        while(n-->0)

        {

            // System.out.println(sc.nextInt());

            int num=sc.nextInt();

            String val=sc.nextLine();

            // System.out.println(val);

            val=val.trim();

            ppl.put(num,val);

        }

        int num=sc.nextInt();

        if(ppl.containsKey(num))

            System.out.println(ppl.get(num));

        else

            System.out.println(-1);

       

       

    }

}

----Thank you----