Write a program to store 20 numbers in a Single Dimensional Array (SDA). Now, display only those numbers that are perfect squares.

import java.util.Scanner;
public class ATS
{
public static void main(String[]args)
{
Scanner in = new Scanner(System.in);
int arr[] = new int[20];
System.out.println("Enter 20 numbers");
for (int i = 0; i < arr.length; i++)
{
arr[i] = in.nextInt();
}
System.out.println("Perfect Squares are:");
for (int i = 0; i < arr.length; i++)
{
double sr = Math.sqrt(arr[i]);
if ((sr - Math.floor(sr)) == 0)
System.out.print(arr[i] + ", ");
}
}
}