我到底那里错了？

public void makan()
    {
        Actor Pelican;
        Pelican = getOneObjectAtOffset(0, 0, Biggold.class);
        if (Pelican != null) {
            Shaoguan laut = (Shaoguan)getWorld();
            laut.removeObject(Pelican);
            Greenfoot.playSound("coin.wav");
            score Score = laut.getscore();
            Score.add(1);
        }
    }