note.java~10~

java编程100例

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);
  }
}