colordemo.java

Java the UML Way 书中所有源码

/*
 * ColorDemo.java   E.L. 2001-08-21
 */

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

public class ColorDemo extends JApplet {
  public void init() {
    Container content = getContentPane();
    Drawing aDrawing = new Drawing();
    content.add(aDrawing);
  }
}

class Drawing extends JPanel {
  public void paintComponent(Graphics window) {
    super.paintComponent(window);
    window.drawString("The color gray, first brighter, then darker", 40, 30);
    Color color = Color.gray;
    window.setColor(color);
    window.fillRect(40, 50, 20, 120);
    color = color.brighter();
    window.setColor(color);
    window.fillRect(60, 50, 20, 120);
    color = color.brighter();
    window.setColor(color);
    window.fillRect(80, 50, 20, 120);
    color = color.darker();
    window.setColor(color);
    window.fillRect(100, 50, 20, 120);
    color = color.darker();
    window.setColor(color);
    window.fillRect(120, 50, 20, 120);
  }
}