How to check if a certain method has been called?

Question

I am trying to make a pop effect for this game that I am creating, and I have run into a problem when trying to check if the method has been called.

I have already took a stab at what I think should work the only problem is the Boolean method, and I have created always returns true?

Here is the code for the class that I think is causing the problem:

public class Handler {
    LinkedList<GameObject> object = new LinkedList<GameObject>();
    public static boolean blank = false;
    public void tick(){
        for(int i = 0; i < object.size();i++){
            GameObject tempObject = object.get(i);

            tempObject.tick();
        }

    }

    public void render(Graphics g){
        for(int i = 0; i < object.size();i++){
            GameObject tempObject = object.get(i);

            tempObject.render(g);
        }

    }

    public void addObject(GameObject object){
        this.object.add(object);
    }

    public void removeObject(GameObject object){
        blank = true;
        this.object.remove(object);
    }
    public static boolean hasObjectRemoved(){
        if(blank = true){
            blank = false;
            return true;
        }
        return false;
    }

}

As you can see, I am trying to check whether or not the removeObject method has been called or not.

Answer 1

if(blank = true)

Should be

if(blank == true)

= is assigning the value of true to the variable blank

== will ask the question is blank equal to true

Answer 2

把它放在你的测试方法中

System.out.println("removeObject method");

Answer 3

When you use blank = true , you are assigning a value rather than comparing the value.

While you can replace it with blank == true , which will work fine, it's unnecessary to use the == operator at all. Instead, use if (blank) to check if it is true, and if (!blank) to check if it is false.