Shift 1's to right and 0's to left for the given int array

import java.util.Scanner;

public class Main {
public static void main(String[] args) {
Scanner sc = new Scanner(System.in);
System.out.println("Enter length of array");
int l = sc.nextInt();
System.out.println("Enter " + l + " elements one by one into array");
int arr[] = new int[l];

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

for (int i = 0; i < arr.length; i++) {
if (arr[i] == 1) {
System.out.print(arr[i]);
}
}

for (int i = 0; i < arr.length; i++) {
if (arr[i] == 0) {
System.out.print(arr[i]);
}
}
sc.close();
}
}


Input - 
Enter length of array
7
Enter 7 elements one by one into array
1
0
0
1
1
0
1

Output - 
1111000

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