塔里木盆地水系图:j2me中的循环

import javax.microedition.midlet.MIDlet;
import javax.microedition.lcdui.Command;
import javax.microedition.lcdui.CommandListener;
import javax.microedition.lcdui.Display;
import javax.microedition.lcdui.Displayable;
import javax.microedition.lcdui.Form;
public class HelloWorld extends MIDlet implements CommandListener
{
private Form form;
public HelloWorld()
{
form = new Form("Test App");
form.append("Hello World!");
form.addCommand( new Command( "Exit", Command.EXIT, 1 ));
form.setCommandListener( this );

}
public void startApp()
{
Display display = Display.getDisplay(this);
display.setCurrent( form );
int a=2;
while(a>5)
{
a++;
}

}
public void pauseApp()
{
}
public void destroyApp(boolean unconditional)
{
form = null;

}
public void commandAction(Command c, Displayable d)
{
destroyApp(true);
notifyDestroyed();

}

}
有什么错吗???