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

public class HelloMicroWorld extends MIDlet { 

   private Display display; 
   private TextCanvas canvas; 

public HelloMicroWorld() { 

   display=Display.getDisplay(this); 
   canvas=new TextCanvas(this); 
   } 

public void startApp() { 

   display.setCurrent(canvas); 
   } 

public void pauseApp() { 
   } 

public void destroyApp(boolean unconditional) { 
   } 

public void exitMIDlet() { 

       destroyApp(true); 
       notifyDestroyed(); 
   } 
} 

class TextCanvas extends Canvas implements CommandListener { 

  private Command cmExit; 
  private String text; 
  private HelloMicroWorld midlet; 

public TextCanvas(HelloMicroWorld midlet) { 

   this.midlet=midlet; 
   text="Hello Micro-World!"; 
   cmExit=new Command("Exit",Command.EXIT, 1); 
   addCommand(cmExit); 
   setCommandListener(this); 
   } 

protected void paint(Graphics g) { 

   g.setColor(255,255,255); 
   g.fillRect(0,0,getWidth(),getHeight()); 
   g.setColor(0,0,0); 
   g.drawString(text,getWidth()/2,getHeight()/2,Graphics.BASELINE|Graphics.HCENTER); 
   } 

public void commandAction(Command c, Displayable d) { 

   if (c==cmExit) 
       midlet.exitMIDlet(); 
   } 
}