helloworld.java

J2ME移动设备程序设计代码 是头几张的 代码 等

import javax.microedition.midlet.*;
import javax.microedition.lcdui.*;

public class HelloWorld extends MIDlet implements CommandListener
{
	private Display ds;
	private Command exitCom;
	private TextBox tb;
	public HelloWorld()
	{
		ds=Display.getDisplay(this);
		exitCom=new Command("Exit",Command.EXIT,1);
		tb=new TextBox("HelloMIDlet","Hello World",15,0);
		tb.addCommand(exitCom);
		tb.setCommandListener(this);
	}
	public void startApp()
	{	
		ds.setCurrent(tb);		
	}
	public void pauseApp()
	{		
	}
	public void destroyApp(boolean u)
	{
	}
	public void commandAction(Command c,Displayable d)
	{
		if (c==exitCom)
		{
			destroyApp(false);
			notifyDestroyed();
		}
	}
}