hey,
how can I limitate a number of objects of the same class being in my world?
for example: a maximum of 3 pencils should be on my desk ^^
bonana wrote ...
2012/11/20
limitating a number of objects
This would be my solution:
// at the top:
import java.util.Hashtable;
// at the beginning of the class:
private Hashtable objectKindCount = new HashTable();
// somewhere in your class:
@Override
public void addObject(Actor object, x, y)
{
Integer num = objectKindCount.get(object.getClass());
int number = 0;
if (num != null)
number = num.intValue();
if (number < limit) {
super.addObject(object,x,y);
objectKindCount.put((number +1), object.getClass());
}
}
My solution would be to add a method (Actor object named "Pencil" to be limited to 3 instances)
Place the code in the class you are adding the pencils into the world from; and use
public boolean canAddPencil()
{
// in the world class, use this line
return getObjects(Pencil.class).size() < 3;
// or, in an actor class, use this line
return getWorld().getObjects(Pencil.class).size() < 3;
}// if in the world class if (canAddPencil()) addObject(new Pencil(), 100, 100); // wherever // if in an actor class if (canAddPencil()) getWorld().addObject(new Pencil(), 100, 100);
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