In First But Second Java

PROGRAM TO FIND ELEMENTS WHICH ARE PRESENT IN FIRST ARRAY AND NOT IN SECOND

import java.util.HashSet;

import java.util.Set;

  

public class MAIN{

  

    // Function for finding elements which  

    // are there in a[] but not in b[]. 

    static void findMissing(int a[], int b[],  

                     int n, int m) 

    { 

        // Store all elements of  

        // second array in a hash table 

        HashSet<Integer> s = new HashSet<>(); 

        for (int i = 0; i < m; i++) 

            s.add(b[i]); 

        

        // Print all elements of first array 

        // that are not present in hash table 

        for (int i = 0; i < n; i++) 

            if (!s.contains(a[i]))

                System.out.print(a[i] + " "); 

    } 

  

     public static void main(String []args){

          

        int a[] = { 1, 2, 6, 3, 4, 5 }; 

        int b[] = { 2, 4, 3, 1, 0 }; 

        int n = a.length; 

        int m = b.length; 

        findMissing(a, b, n, m);

     }

}







OUTPUT

6 5

CREDITS: https://www.geeksforgeeks.org/find-elements-present-first-array-not-second/