Variasi Bintang - 3

import javax.swing.*;

 public class bintang3 {

    public static void main (String[]args) {

    int angka=Integer.valueOf(JOptionPane.showInputDialog("Masukkan Angka"));

        for (int i=1;i<=angka;i++) {

            for (int j=angka;j>i;j--) {

                System.out.print(" ");

            }

            for (int k=1;k<=i;k++) {

                System.out.print("*");

            }

            System.out.println();

        }

    }

 }

 

Hasilnya :

    *

   **

  ***

 ****

*****