Question

Print duplicate elements of an array.

				
					Input:
ENTER THE SIZE OF ARRAY:10
ENTER THE ELEMENT IN THE ARRAY:
1 2 3 4 5 6 7 8 9 10 

ARRAY AFTER DELETING EVEN POSITION ELEMENTS:
2 4 6 8 10

Share code with your friends

Code

				
					import java.util.Scanner;
public class duplicateNumbersInArray
{  
    public static void main(String[] args)
    {  
        /* Initialize array */  
        int [] arr;

        int n=0,i=0,j=0,count=0;
        Scanner sc = new Scanner(System.in);    

        System.out.println("Enter a number of elements in the array");   
        n = sc.nextInt(); 
        arr=new int[n];
        System.out.println("Enter numbers in array");

        for(i=0;i< n;i++)
        {
            arr[i]=sc.nextInt();
        }

        System.out.println("Duplicate numbers in array are:");  
        
        /*finding the frequency of elements the array and printing the number and frequency of it */  
        for ( i = 0; i < n; i++)
        {   
            count=0;
            if(arr[i]!=-9999999)
            {
                for(j=0;j< n;j++)
                {

                    if(arr[j]==arr[i])
                    {
                        /* replacing the duplicate element so that it is not repeated again */
                        arr[j]=-9999999; 
                        count++;

                    }
                }
                if(count>1)
                {
                    System.out.println(i+"  ");
                }
            }    

        }  
    }    
}