flagmaker1.java

来自「Java经典例程 从外国一大学计算机教授出版物下载的代码 经典」· Java 代码 · 共 47 行

import java.awt.*;
import java.awt.event.*;

class FlagMaker1 extends Frame {

  /* Flag drawing program       J M Bishop April 2000
   * --------------------
   * Illustrates colour and simple graphic output
   */

 FlagMaker1 () {
    add ("Center", new Flag());
    // Enable the program to end when the window is closed
    addWindowListener(new WindowAdapter () {
      public void windowClosing(WindowEvent e) {
        System.exit(0);
      }
    });

    // Set the frame's title and size and activate the drawing
    // described by the paint method.
    setTitle ("A Flag");
    setSize (300, 200);
    setVisible (true);
  }

  public static void main (String [ ] args) {
    new FlagMaker1 ();
  }
}

class Flag extends Canvas {
  public void paint (Graphics g) {
    // Draw the flag using coloured rectangles
    g.setColor (Color.black);
    g.fillRect (40,40,200,40);
    g.setColor (Color.red);
    g.fillRect (40,80,200,40);
    g.setColor (Color.yellow);
    g.fillRect (40,120,200,40);

    // Label the drawing
    g.setColor (Color.black);
    g.drawString("Germany",100,180);
  }
}