welcomemidlet.java

来自「java web services how to program」· Java 代码 · 共 37 行

// Fig. 17.4: WelcomeMIDlet.java.
// Class WelcomeMIDlet is a MIDlet that displays "Welcome to J2ME!"
// to the user.
package com.deitel.jws1.j2me.client;

// import Java 2 Micro Edition packages
import javax.microedition.midlet.*;
import javax.microedition.lcdui.*;

public class WelcomeMIDlet extends MIDlet {

   private Display display; // display manager
   private Form mainScreen; // screen to display

   // constructor initializes display manager for MIDP device
   public WelcomeMIDlet()
   {
      display = Display.getDisplay( this );
   }

   // called to start MIDlet after AMS calls constructor
   public void startApp()
   {
      // create a Form to display
      mainScreen = new Form( "WelcomeMIDlet" );
      mainScreen.append( "Welcome to J2ME!" );

      display.setCurrent( mainScreen ); // display Form
   }

   // called by AMS to pause MIDlet state
   public void pauseApp() {}

   // called by AMS to terminate MIDlet lifecycle
   public void destroyApp( boolean unconditional ) {}

} // end class WelcomeMIDlet