//RandomStars.java

import java.awt.*;
import javax.swing.*;

public class RandomStars {     

    //public void init() {
    public static void main(String[] argv) {

	String input;
	int rows, cols;
	int percent;
	
	input = JOptionPane.showInputDialog("Enter #rows (height)");
	rows = Integer.parseInt(input);
	input = JOptionPane.showInputDialog("Enter #columns (width)");
	cols = Integer.parseInt(input);
	input = JOptionPane.showInputDialog("Enter percentage");
	percent = Integer.parseInt(input);
	
	JTextArea starstextarea = new JTextArea(rows,cols+1);  //optional: rows,cols
	starstextarea.setFont( new Font("Courier",Font.BOLD,18) );
	JScrollPane starsscrollpane = new JScrollPane(starstextarea);
		
	
	for (int row=1; row<=rows; row++) {
	    for (int col=1; col<=cols; col++) 
		if (Math.random() < percent/100.0)
	            starstextarea.append(""+(char)2588);
	        else 
	            starstextarea.append(" ");
	    starstextarea.append("\n");
	}
	
	JOptionPane.showMessageDialog(null, 
				      starsscrollpane,
				      "Random Stars",
				      JOptionPane.PLAIN_MESSAGE);

    }
}