Finding Duplicate Elements in Array

import java.util.*;
class Main
{
    public static void main(String args[])
    {
        Scanner src=new Scanner(System.in);
        System.out.println("Enter the size of array");
        int n=src.nextInt();
        int arr[]=new int[n];
        for(int i=0;i<n;i++)
        {
            System.out.println("Enter element");
            arr[i]=src.nextInt();
        }
        System.out.println("The entered array is");
        for(int j=0;j<n;j++)
        {
            System.out.println(arr[j]);
        }
        ArrayList<Integer> repeat =new ArrayList<>();
        for(int k=0;k<n;k++)
        {
            int rp=arr[k];
            for(int j=k+1;j<n;j++)
            {
                if (rp==arr[j])
                {
                    repeat.add(arr[j]);
                }
            }
        }

        System.out.println("The duplicate elements in array are "+repeat);

    }
}