Led On and Off with java

BlinkingLED.jad

MIDlet-Name: BlinkingLED
MIDlet-Version: 1.0
MIDlet-Vendor: PiJava Tutorials
MIDlet-1: BlinkingLED,,BlinkingLED
MIDlet-Jar-Size:  
MIDlet-Jar-URL: BlinkingLED.jar

manifest

MIDlet-Name: BlinkingLED
MIDlet-Version: 1.0
MIDlet-Vendor: PiJava Tutorials
MIDlet-1: BlinkingLED,,BlinkingLED
MicroEdition-Configuration: CLDC-1.8
MicroEdition-Profile: MEEP-8.0
MIDlet-Permission-1: jdk.dio.DeviceMgmtPermission "*:*" "open"
MIDlet-Permission-2: jdk.dio.gpio.GPIOPinPermission "*:*"

source code

import javax.microedition.midlet.MIDlet;
import jdk.dio.gpio.*;
import jdk.dio.*;
import java.io.*;

class BlinkingLED extends MIDlet implements PinListener {
    private static GPIOPin pin = null;

    @Override
    public void startApp() {
        System.out.println("in startApp method");
        try {
            GPIOPinConfig config = new GPIOPinConfig.Builder()
                .setControllerNumber(0)
                .setPinNumber(18)
                .setDirection(GPIOPinConfig.DIR_OUTPUT_ONLY)
                .setDriveMode(GPIOPinConfig.MODE_OUTPUT_PUSH_PULL)
                .setInitValue(false)
                .build();

            pin = DeviceManager.open(GPIOPin.class, config);
            for (int i = 0; i < 200; i++) {
                pin.setValue(true);
                System.out.println("On " + i);
                Thread.sleep(100);
                pin.setValue(false);
                Thread.sleep(900);
            }
        } catch (IOException e) {
            e.printStackTrace();
        } catch(InterruptedException e) {
            System.out.println("Thread interrupted: " + e.getMessage());
        } finally {
            try {
                if (pin != null) {
                    System.out.println("Closing GPIO pin");
                    pin.close();
                }
            } catch (Exception e) {
                e.printStackTrace();
            }
        }
    }

    @Override
    public void destroyApp(boolean unconditional) {
        try {
            if (pin != null) {
                System.out.println("destroy called, closing GPIO pin");
                pin.close();
            }
        } catch (IOException e) {
            e.printStackTrace();
        }
    }

    @Override
    public void valueChanged(PinEvent event) {        
    }
}