Thread: Problem with for each cicles

Hi guys
i have a problem, first i have two cicles for each to print a line like a cross to an object, thats actualize the line when the object moves, my problem is when i got two objects pointing to the same object, the cross line of the first targeting him, dont desapears from the map and i dont know why.

sorry for my bad english
Thanks
Entertainer

bug.jpg

for (SimpleImage tower : towers) {
for (MovingImage x : invaders) {
if (Math.abs(tower.getPosition().distance(x.getPositi on())) < RANGE) {

SimpleShape s = new SimpleShape(
new Line2D.Double(tower.getPosition().getX()
+ tower.getDimension().width / 2, tower
.getPosition().getY()
+ tower.getDimension().height / 2, x
.getPosition().getX()
+ x.getDimension().width / 2, x
.getPosition().getY()
+ x.getDimension().height / 2), Color.blue, 50);

shot = s;
window.getDisplayer().add(s);



}
}
}
}

if (shot != null) window.getDisplayer().remove(shot);  
        for (SimpleImage tower : towers) {  
        for (MovingImage x : invaders) {  
 
                if (Math.abs(tower.getPosition().distance(x.getPosition())) < RANGE) {  
 
                    // if (shooting == true) { // to target one target at once   
 
 
                    System.out.println(shot);  
                    SimpleShape s = new SimpleShape(  
                            new Line2D.Double(tower.getPosition().getX()  
                                    + tower.getDimension().width / 2, tower  
                                    .getPosition().getY()  
                                    + tower.getDimension().height / 2, x  
                                    .getPosition().getX()  
                                    + x.getDimension().width / 2, x  
                                    .getPosition().getY()  
                                    + x.getDimension().height / 2),  
                            Color.green, 100);                  window.getDisplayer().refresh();  
                                    shot = s;  
 
                        window.getDisplayer().remove(shot);  
 
                                                shooting = false;  
 
                    window.getDisplayer().add(s);  
 
                    }  
 
                }  
            }

My objective is target two objects at the same time( two or more towers pointing at objects if they are in range), i think the problem is when we change the tower s(variable) turns null but i dont know why...

Image:bug.jpg

i think when two objects tower change the value of variable s, my ideia is dont let second tower change s value but i dont know how can i do it ;/

thats is the problem i dont know which tower acess to variable s and i dont know how to restrict that ;/