simplemidlet.java

来自「《J2ME实用教程》清华大学出版社出版」· Java 代码 · 共 39 行

package com.j2medev.chapter2;

import javax.microedition.lcdui.*; 
import javax.microedition.midlet.MIDlet; 
import java.io.*;
 
public class SimpleMIDlet extends MIDlet implements CommandListener {
  private Display display = null; 
  private Command exitCommand = new Command("退出", Command.EXIT, 0); 
  public void startApp() { 
    display = Display.getDisplay(this); 
     
    Form mainForm = new Form("simple"); 

    Image img = null;
    try{
      img = Image.createImage("/JavaPowered.png");
    }catch(IOException ex){
      ex.printStackTrace();
    }
    if(img != null) 
      mainForm.append(img); 
     
    mainForm.addCommand(exitCommand); 
    mainForm.setCommandListener(this); 
     
    display.setCurrent(mainForm); 
  } 
   
  public void pauseApp () {} 
   
  public void destroyApp(boolean unconditional) {} 
   
  public void commandAction(Command cmd, Displayable s) { 
    if (cmd==exitCommand) 
      notifyDestroyed(); 
  } 
}