尝试调用从另一个类调用另一个方法的方法时出现StackOverflowError

Question

I think the method is calling itself or something.

Here's my code:

public boolean isRaak(int rij, int kolom)
    {
        boolean raak = isRaak(rij, kolom); //this "isRaak" should refer to a method in another class, not sure how to do this...
        return raak;
    }

Answer 1

Two ways

If that is a instance method, You need to create instance of that and call it.

public boolean isRaak(int rij, int kolom)
    {
        AnotherClass an =new AnotherClass();
        boolean raak = an.isRaak(rij, kolom);  
        return raak;
    }

If that is a static method

public boolean isRaak(int rij, int kolom)
    {            
        boolean raak = AnotherClass.isRaak(rij, kolom);   
        return raak;
    }

But your method seems like an Utility method to me,So go for static method,if so.

Before proceeding further, Prefer to read:

• Understanding Instance and Class Members

Answer 2

The error is pretty evident. Call the method by prefixing the classname if the method is static, else call the method with the object of the class.

Answer 3

I can think of 3 ways to accomplish this:

1. Create a new instance of your AnotherClass and call the isRaak method:

    public boolean isRaak(int rij, int kolom) { return new Anotherclass().isRaak(rij, kolom); } 

2. Reuse a current instance of your AnotherClass and call the isRaak method:

    //field in the class initialized somewhere along your current class... AnotherClass anotherClass = ... public boolean isRaak(int rij, int kolom) { return anotherClass.isRaak(rij, kolom); } 

3. If the method is declared as static in AnotherClass , call the method directly from the class without using an instance.

    public boolean isRaak(int rij, int kolom) { return AnotherClass.isRaak(rij, kolom); } 

Note that the first two methods assume the constructor of AnotherClass doesn't need to receive parameters, but this should be adaptable to your specific case.