mousexy.java

java用awt写的界面程序

//==============================================================
// MouseXY.java - Demonstrates old style AWT handleEvent() method
//
// Java学习源代码检索系统 Ver 1.0 20031015 免费正式版
// 版权所有: 中国IT认证实验室(www.ChinaITLab.com)
// 程序制作: ChinaITLab网校教研中心
// 主页地址: www.ChinaITLab.com    中国IT认证实验室
// 论坛地址: bbs.chinaitlab.com  
// 电子邮件: [e-mail]
//==============================================================

import java.applet.*;
import java.awt.*;

public class MouseXY extends Applet {
 String location;  // String for X=0 Y=0 display

 // Initialize applet variables and window
 public void init() {
  setBackground(Color.yellow);
  resize(200, 100);
  location = new String("Move mouse inside window");
 }

 // Paint the location string inside window
 public void paint(Graphics g) {
  g.drawString(location, 10, 10);
 }

 // Create the location string from x and y
 public void makeString(int x, int y) {
  location = new String(
   " X=" + String.valueOf(x) +
   " Y=" + String.valueOf(y) );
 }

 // Handle all events for this applet
 public boolean handleEvent(Event  evt) {
  boolean eventHandled = false;
  switch (evt.id) {
   case Event.MOUSE_DOWN:
   case Event.MOUSE_UP:
   case Event.MOUSE_DRAG:
   case Event.MOUSE_ENTER:
   case Event.MOUSE_MOVE: {
    makeString(evt.x, evt.y);
    repaint();
    eventHandled = true;
    break;
   }
   case Event.MOUSE_EXIT: {
    location = new String("Move mouse inside window");
    repaint();
    eventHandled = true;
   }
  }
  if (eventHandled)
   return true;
  else
   return super.handleEvent(evt);
 }
}