Greenfoot Counter minus one

Question

Hi i'm trying to decrease the counter with 1 in the public void minScore

score++ adds the counter with 1 what is the equivalent to decrease the counter with 1 ?

public class Counter  extends Actor
{
    private int score = 0;

    public void act()
    {
        setImage(new GreenfootImage("Score : 0" + score, 24, Color.WHITE, Color.BLUE));
    }

    /**
     * Increase the total amount displayed on the counter, by a given amount.
     */
    public void addScore()
    {
        score++;
    }

    public void minScore()
    {
        score++;
    }

}

that came to my mind too but that gives a syntax error . it's --score; — R.m, Oct 18 '15 at 15:43

Andrew Tobilko · Accepted Answer · 2015-10-18T15:08:25.733

1

You may use score-- (return old value and decrease this value) or --score (decrease this value and return updated value) to decrease your counter.

I advice you to write methods that returns value, like:

public int decrementAndGet() {
    return --score;
}

public int getAndDecrement() {
    return score--;
}

By analogy with names of methods in atomic classes.

edited Oct 18 '15 at 15:08

answered Oct 18 '15 at 14:56

Andrew Tobilko

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Greenfoot Counter minus one

1 Answers1