Write a program in Java to display the following pattern:

1
11
101
1001

public class KboatPattern
{
    public static void main(String args[]) {
        for (int i = 1; i <= 4; i++) {
            for (int j = 1; j <= i; j++) {
                if (j == 1 || j == i)
                    System.out.print(1);
                else
                    System.out.print(0);
            }
            System.out.println();
        }
    }
}