2 replies to this topic

[domestic]

Hey. Im building this J2ME app. Basically, its an alarm, but I got a problem.

I set the alarm and everything and it works perfect, except that the timer never works and I don't know why.

        long now = new Date().getTime();
        stringItem3 = new StringItem(alarmDate.toString(), null);

        System.out.println(alarmDate.getTime() - now);

        long amount = alarmDate.getTime() - now;
        alarmTimer.schedule(at, amount); //error here
        System.out.println("im here");
    }

    class Alarmer extends TimerTask {

        public void run() {
            System.out.println("i run");
        }
    }

Everytime though, it reaches the alarmTimer.schedule and throws this error:

TRACE: <at java.lang.NullPointerException:   0>, Exception caught in Display class
java.lang.NullPointerException:   0
        at VisualMIDlet.doAlarm(VisualMIDlet.java:510)
        at VisualMIDlet.commandAction(VisualMIDlet.java:189)
        at javax.microedition.lcdui.Display$ChameleonTunnel.callScreenListener(), bci=46
        at com.sun.midp.chameleon.layers.SoftButtonLayer.processCommand(), bci=74
        at com.sun.midp.chameleon.layers.SoftButtonLayer.soft1(), bci=37
        at com.sun.midp.chameleon.layers.SoftButtonLayer.softPress(), bci=29
        at com.sun.midp.chameleon.layers.SoftButtonLayer.pointerInput(), bci=142
        at com.sun.midp.chameleon.CWindow.pointerInput(), bci=76
        at javax.microedition.lcdui.Display$DisplayEventConsumerImpl.handlePointerEvent(), bci=19
        at com.sun.midp.lcdui.DisplayEventListener.process(), bci=296
        at com.sun.midp.events.EventQueue.run(), bci=179
        at java.lang.Thread.run(Thread.java:619)

510 is the alarmTimer.schedule line. Any ideas? Please.

[ZekeDragon]

You don't show where you initialize the Alarmer object as the name "at", which seems to be the problem. If "at" is not initialized, or for some other reason is NULL, you'll get that exception.

[domestic]

Woops. Forgot to initialise either timer... Dam. My bad! Cheers mate.