fun.java~32~

jbuilder 100例 java源码学习,非常不错,有需要朋友下来

package joy;

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

public class fun extends Applet {
  int x;
  boolean flag;
  boolean isStandalone = false;
  JToggleButton joy = new JToggleButton();
  /**Get a parameter value*/
  public String getParameter(String key, String def) {
    return isStandalone ? System.getProperty(key, def) :
      (getParameter(key) != null ? getParameter(key) : def);
  }

  /**Construct the applet*/
  public fun() {
  }
  /**Initialize the applet*/
  public void init() {
    try {
      jbInit();
    }
    catch(Exception e) {
      e.printStackTrace();
    }
  }
  /**Component initialization*/
  private void jbInit() throws Exception {
    joy.setText("joy");
    joy.addActionListener(new java.awt.event.ActionListener() {
      public void actionPerformed(ActionEvent e) {
        joy_actionPerformed(e);
      }
    });
    this.setBackground(Color.lightGray);
    this.addKeyListener(new java.awt.event.KeyAdapter() {
      public void keyPressed(KeyEvent e) {
      }
    });
    this.add(joy, null);
  }
  /**Get Applet information*/
  public String getAppletInfo() {
    return "Applet Information";
  }
  /**Get parameter info*/
  public String[][] getParameterInfo() {
    return null;
  }

  void joy_actionPerformed(ActionEvent e) {
   if(x==0)
      flag=true;
   if(flag==true)
      x++;
   else
      x--;
    repaint();
    if(x==6){
      flag=false;
      x=0;
   }
  }
  public void update(Graphics g){
  paint(g);
  g.clearRect(0,0,300,40);
  }
  public void paint(Graphics g){
       switch(x){
         case 0:
            joy.setText("head");
            break;
          case 1:
            g.drawArc(50,50,150,100,0,360);
             joy.setText("eye");
             break;
          case 2:
             g.setColor(Color.black);
             g.fillOval(90,70,10,10);
             g.fillOval(150,70,10,10);
             joy.setText("nose");
             break;
           case 3:
             int x[]={125,120,130};
              int y[]={100,120,120};
             g.setColor(Color.red);
              g.fillPolygon(x,y,3);
             joy.setText("mouth");
             break;
            case 4:
            joy.setText("ear");
             g.setColor(Color.yellow);
             g.drawLine(110,130,140,130);
             g.drawArc(110,110,30,20,180,180);
            break;
            case 5:
             g.drawOval(40,90,10,10);
             g.drawOval(190,90,10,10);
                joy.setText("clear");
                break;
              }
     }
  }