Java – if (pause = = null) {does not work

When pause is null, I use if (pause = = null) to perform some operations But I made a mistake

For parameter type long, null, operator = = undefined

This is the code,

public class Timer extends CountDownTimer {
    long pause = (Long) null;

    public Timer(long startTime,long interval) {
        super(startTime,interval);
    }

    @Override
    public void onTick(long millisUntilFinished) {
        content.setText("Tijd over: " + millisUntilFinished / 100);
    }

    public void onPause(long millisUntilFinished) {
        if(pause == null) {
            pause = millisUntilFinished;
            content.setText("Tijd over: " + millisUntilFinished / 100);
            this.cancel();
        }
        else {
            this.start();   
        }
    }

    @Override
    public void onFinish() {
        content.setText("Tijd is op!");
    }
}

This class is not yet complete, so ignore the rest of the code

Solution

The variable pause is very long, so the pause will never be null, and the compiler will be confused Either make it long or use some invalid in band indication