Question

I’m trying to make a game and for the gun class, I need every bullet to be a constructor object, how do I edit every constructor at once? Like change each bullet’s x value?

Answer 1

Let’s me make a hard guess.

class Gun{
  Bullet bullet;
  public Gun(){
   bullet = new Bullet();
  }
}
class Bullet{
 public int x=0;
 public Bullet(){
   x=10;
 }
}

You want to change all the Bullet’s x value at once(As I understood). Then you have to keep all the Bullet instances in a data structure.

static List<Bullet> bullets = new ArrayList<Bullet>();

Then update the constructor of Bullet like below.

class Bullet{
 public int x=0;
 public Bullet(){
   x=10;
   Gun.bullets.add(this);
 }
}

Then iterate through the bullets list and make the change you want to make.

for(Iterator i = bullets.iterator(); i.hasNext();){
 i.next().x = 12;
}

Hope this helps.