//helloworld.java,一个最简单的midlet程序。

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

public class helloworld extends midlet implements commandlistener {

private command exitcommand;
private textbox tb;

public helloworld(){
exitcommand =new command("exit",command.exit,1);
tb =new textbox("hello midlet","hello,world!",15,0);
tb.addcommand(exitcommand);
tb.setcommandlistener(this);
}

protected void startapp(){
display.getdisplay(this).setcurrent(tb);
}

protected void pauseapp(){
}

protected void destroyapp(boolean u){
}

public void commandaction(command c,displayable d){
if (c ==exitcommand){
destroyapp(false);
notifydestroyed();
}
}
}