What line is the exception being thrown at? Also, show the error trace printed in the terminal window.

public void act() { isTouchingGoal(); isTouchingShooter(); //setRotation(direction); setLocation(getX() + xSpeed, getY() - ySpeed); life--; if(life == 0) { Greenfoot.delay(10); //getWorld().removeObject(this); //wait for mouseClick if (Greenfoot.mouseClicked(null)) { MouseInfo mouseInfo = Greenfoot.getMouseInfo(); getWorld().addObject(new Ball(), 311, 365); getWorld().addObject(new Ball(), 540, 321); direction = Greenfoot.getRandomNumber(360) + (-135); xSpeed = Greenfoot.getRandomNumber(10) + 1; ySpeed = Greenfoot.getRandomNumber(10) + 1; life = Greenfoot.getRandomNumber(1000) + 10; } } } public void isTouchingGoal() { Actor goal = getOneIntersectingObject(Goal.class); if(goal != null) { count.add(1); Greenfoot.playSound("applause.wav"); if(count.getValue() == 5) { Greenfoot.playSound("celebration.wav"); Greenfoot.stop(); } } } Run-time error: java.lang.NullPointerException at Ball.isTouchingGoal(Ball.java:53) at Ball.act(Ball.java:22) at greenfoot.core.Simulation.actActor(Simulation.java:594) at greenfoot.core.Simulation.runOneLoop(Simulation.java:552) at greenfoot.core.Simulation.runContent(Simulation.java:215) at greenfoot.core.Simulation.run(Simulation.java:205)

I am guessing that line 53 in the class is the one where you call 'add' on some 'count' field reference (I believe that this is the only place in the 'isTouchingGoal' method where a 'nullPointerException' could be thrown as you are checking that 'goal' is not null). Apparently 'count' is 'null', in that it has not been initialized to refer to any actual object.

This is the nullPointerException that I keep getting for the code java.lang.NullPointerException at Ball.isTouchingGoal(Ball.java:53) at Ball.act(Ball.java:22) at greenfoot.core.Simulation.actActor(Simulation.java:594) at greenfoot.core.Simulation.runOneLoop(Simulation.java:552) at greenfoot.core.Simulation.runContent(Simulation.java:215) at greenfoot.core.Simulation.run(Simulation.java:205)