lotsofcircles.java

来自「Java程序设计技巧与开发实例附书源代码。」· Java 代码 · 共 24 行

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

public class LotsOfCircles
        extends JPanel
{
    public void paintComponent(Graphics g)
    {
        super.paintComponent(g);
        for (int i = 0; i < 10000; i++)
        {
            Color color = new Color( (int) (255 * Math.random()),
                                    (int) (255 * Math.random()),
                                    (int) (255 * Math.random()));
            int x = (int) (getSize().width * Math.random());
            int y = (int) (getSize().height * Math.random());
            g.setColor(color);
            g.fillOval(x - 10, y - 10, 20, 20);
        }
    }
}