bintang 1 & 2

-Inputan bintang_1-

import javax.swing.*;
public class tugas_bintang1 {
public static void main (String [] args){
    int x;
    x=Integer.valueOf(JOptionPane.showInputDialog("Masukan banyak bintang?"));
    for(int i=1;i<=x;i++){
        for (int j=1;j<=x;j++){
            if (j<=i)
                System.out.print("*");
            else
                System.out.print(" ");
        }
        System.out.println();
        }
    }

}


-output-
* 
**
***
****



-Inputan Bintang_2-

import javax.swing.*;
public class tugas_bintang2 {
public static void main (String [] args){
    int baris,x,y;
    baris=Integer.valueOf(JOptionPane.showInputDialog("Masukan banyak bintang?"));
    x=baris+1;
    for(int i=1;i<=baris;i++){
        for (int j=1;j<=baris;j++){
            y=i+j;
            if (y<=x)
                System.out.print("*");
            else
                System.out.print(" ");
        }
        System.out.println();
        }
    }

}


-Output-
****
***
**
*