Hi, I am new to greenfoot and I am currently getting an error with this. I have created a sceanario in which you control a player and you "eat" goals to get points in a maze. If the player touches a mazewall, he or she will be spawned back at the starting point. This is where the error comes in. After spawning again, if one tries to "eat" a goal to add points the error will happen.
This is my terminal window
java.lang.NullPointerException
at Player.TrytoEat(Player.java:56)
at Player.act(Player.java:23)
at greenfoot.core.Simulation.actActor(Simulation.java:568)
at greenfoot.core.Simulation.runOneLoop(Simulation.java:526)
at greenfoot.core.Simulation.runContent(Simulation.java:215)
at greenfoot.core.Simulation.run(Simulation.java:205)
this is my player code
this is my mazewall that respawns the player if he touches the wall
private Counter counter;
/**
* Act - do whatever the Player wants to do. This method is called whenever
* the 'Act' or 'Run' button gets pressed in the environment.
*/
public void act()
{
CheckKeys();
TrytoEat();
}
public Player (Counter count)
{
counter = count;
}
public void CheckKeys()
{
if ( Greenfoot.isKeyDown("up"))
{
move(-1);
}
if ( Greenfoot.isKeyDown("down"))
{
move(2);
}
if ( Greenfoot.isKeyDown("left"))
{
turn(-5);
}
if ( Greenfoot.isKeyDown("right"))
{
turn(5);
}
}
public void TrytoEat()
{ if(canSee(Goal.class))
{
eat(Goal.class);
counter.add(2);
if (counter.getValue()> 8)
{
gameOver();
}
}
}
public void gameOver()
{
Greenfoot.stop();
}
}
private Counter counter;
/**
* Act - do whatever the MazeWall wants to do. This method is called whenever
* the 'Act' or 'Run' button gets pressed in the environment.
*/
public void act()
{
TrytoEatHuman();
}
public void TrytoEatHuman()
{
if (canSee(Player.class))
{
eat(Player.class);
addPlayer();
}
}
public void gameOver()
{
Greenfoot.stop();
}
public void addPlayer()
{
Player player = new Player(counter);
World world = getWorld();
int x = 34;
int y = 42;
world.addObject(player, x, y);
}
}