drawobject.java

源码为科学出版社出版的英文<java设计模式>(影印版)所用的所有例子程序

import java.awt.*;
import javax.swing.*;
public class DrawObject extends JxFrame {
  
  private Rectangl rect;
  private Circle circ;
  private Triangle tri;

  public DrawObject() {
      super("title");
      JPanel jp = new JPanel();
      getContentPane().add(jp);
      rect = new Rectangl(20,30);
      circ = new Circle(40);
      tri = new Triangle(10, 20, 30);
      
  }
  public void paint(Graphics g) {
      rect.draw(g);
      circ.draw(g);
      tri.draw(g);
  }
}