Write a program in Java to display the following pattern:

1
121
12321

public class KboatPattern
{
    public static void main(String args[]) {
        for (int i = 1; i <= 3; i++) {
            for (int j = 1; j <= i; j++)
                System.out.print(j);
            for (int k = i - 1; k >= 1; k--)
                System.out.print(k);
            System.out.println();
        }
    }
}