写一个j2me的hello word小例子

import javax.microedition.lcdui.Display;
import javax.microedition.lcdui.Displayable;
import javax.microedition.midlet.MIDlet;

public class reader extends MIDlet {

public reader()
{
}

public void pauseApp()
{

}

textview tv;
public void startApp()
{
Displayable current = Display.getDisplay(this).getCurrent();
if(current == null)
{
if(tv==null)
tv = new textview(this);
Display.getDisplay(this).setCurrent(tv);
tv.run();
}
}

protected void destroyApp(boolean b)
{

}

}

---------------------------

import javax.microedition.lcdui.Canvas;
import javax.microedition.lcdui.Graphics;

public class textview extends Canvas implements Runnable{

static reader app;

public textview(reader r)
{
app = r;
}