Bintang2

import javax.swing.*;
public class tugas_bintang {
    public static void main(String[] args){
        int baris,x,y;
baris=Integer.valueOf(JOptionPane.showInputDialog("Masukkan Banyak Bintang ?"));
        x=baris+1;
for (int i=1;i<=baris;i++){
    for (int j=1;j<=baris;j++){
        y=i+j;
        if (x<=y)
            System.out.print("*");
        else
            System.out.print(" ");
    }
    System.out.println();
}
    }
}