passing object of class to another class

Question

I have two classes. Class A and Class B.

I have a function in Class A that i would like to use in class B. I was

Answer 1

Do something like this

class ClassA {
    public ClassA() {    // Constructor
    ClassB b = new ClassB(this); 
}

class ClassB {
    public ClassB(ClassA a) {...}
}

The this keyword essentially refers to the object(class) it's in.