jbuilder 100例　java源码学习,非常不错,有需要朋友下来

				package untitled2;								import java.awt.*;				import java.awt.event.*;				import java.applet.*;								public class note extends Applet {				  int i=10,j=10;				  Color mycolor;				  Font myfont;				  String str;				  boolean isStandalone = false;				  /**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 note() {				  }				  /**Initialize the applet*/				  public void init() {				    try {				      jbInit();				    }				    catch(Exception e) {				      e.printStackTrace();				    }				  }				  /**Component initialization*/				  private void jbInit() throws Exception {				    this.addKeyListener(new java.awt.event.KeyAdapter() {				      public void keyPressed(KeyEvent e) {				        this_keyPressed(e);				      }				    });				  }				  /**Get Applet information*/				  public String getAppletInfo() {				    return "Applet Information";				  }				  /**Get parameter info*/				  public String[][] getParameterInfo() {				    return null;				  }								  void this_keyPressed(KeyEvent e) {				        i+=15;				        if(i>200){				          i=10;				          j=j+20;				        }				        str = String.valueOf(e.getKeyChar());				        repaint();				  }				  public void paint(Graphics g){				     mycolor = new Color(30,155,155);				     g.setColor(mycolor);				     myfont = new Font("TimesRoman",Font.BOLD,20);				     g.setFont(myfont);				     g.drawString(str,i,j);				  }				  public void update(Graphics g){				     paint(g);				  }				}