Greenfoot

khalid11

2015/1/11

#

inside my bullet class

public void destroyEnemies()
    {
        
        Actor enemy = getOneIntersectingObject(enemy.class);
        if(enemy != null) 
        {
           World myWorld = getWorld();
           getWorld().removeObject(enemy);  
           getWorld.removeObject(this);                   
        }
    }
//cannot find symbol variable getWorld

erdelf

2015/1/11

#

line 9, you forgot the braces

getWorld().removeObject(this);

khalid11

2015/1/11

#

thank you let me try

khalid11

2015/1/11

#

nice one it worked

khalid11

2015/1/11

#

A new error appears in a new window

java.lang.IllegalStateException: Actor not in world. An attempt was made to use the actor's location while it is not in the world. Either it has not yet been inserted, or it has been removed.
	at greenfoot.Actor.failIfNotInWorld(Actor.java:681)
	at greenfoot.Actor.getOneIntersectingObject(Actor.java:930)
	at bullet.kill(bullet.java:60)
	at bullet.act(bullet.java:30)

erdelf

2015/1/11

#

I need to see the kill method for this one

khalid11

2015/1/11

#

from which class ,my bullets?

erdelf

2015/1/11

#

yeah

khalid11

2015/1/11

#

its just this 
    public void destroyEnemies()
    {
        
        Actor enemy = getOneIntersectingObject(enemy.class);
        if(enemy != null) 
        {
            World myWorld = getWorld();
            getWorld().removeObject(enemy);  
            Level1 level1 = (Level1)myWorld;
            Counter counter = level1.getCounter();
            counter.addScore();
        }
    }

danpost

2015/1/11

#

Actually, it is your act method that you need to show (yes, of your bullet class).

khalid11

2015/1/11

#

 public void act() 
    {
        destroyEnemies ();
        move(5);
        kill();
        if (this.atWorldEdge()) {
            getWorld().removeObject(this);
        }     
    }

danpost

2015/1/11

#

Ok. Apparently you are removing the objects from the world in the kill method; and then, after that in the kill method you are trying to use the 'getOneIntersectingObject' method which cannot work if the actor was removed from the world. If I am mistaken, which I do not think I am, go ahead and post the code of the kill method. Once you get by that, you will get the same error in the 'atWorldEdge' method which will then need to be dealt with.

khalid11

2015/1/11

#

public void kill() { //"Enemy" can be any class that you want the bullet to destroy. Actor blueenemy = getOneIntersectingObject(blueenemy.class); if(blueenemy != null) { getWorld().removeObject(blueenemy); } }

danpost

2015/1/11

#

Ok. Clear your terminal window; compile your project; re-create the error; and copy/paste the entire error message along the entire bullet class code (just select all and copy/paste). It is difficult to figure out what is going on when only getting bits and pieces at different times.

khalid11

2015/1/11

#

java.lang.IllegalStateException: Actor not in world. An attempt was made to use the actor's location while it is not in the world. Either it has not yet been inserted, or it has been removed.
	at greenfoot.Actor.failIfNotInWorld(Actor.java:681)
	at greenfoot.Actor.getOneIntersectingObject(Actor.java:930)
	at bullet.kill(bullet.java:62)
	at bullet.act(bullet.java:31)
	at greenfoot.core.Simulation.actActor(Simulation.java:583)
	at greenfoot.core.Simulation.runOneLoop(Simulation.java:541)
	at greenfoot.core.Simulation.runContent(Simulation.java:215)
	at greenfoot.core.Simulation.run(Simulation.java:205)

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trying to make bullet dissapear when it hits enemy but cannot find symbol variable getWorld