How to do call by reference in Java?

Question

Since Java doesnt support pointers, How is it possible to call a function by reference in Java like we do in C and C++??

Answer 1

Yes, you can implement Call by Reference in another way by "Pass by Reference".

• You should pass the reference object of a class created.
• Then you can manipulate the object's data by member function (.), which will be reflected in original data.

In below code the original data --> x is manipulated by passing the reference object.

public class Method_Call {
static int x=50;
public void change(Method_Call obj) {
    obj.x = 100;
}

public static void main(String[] args) {

    Method_Call obj = new Method_Call();
    System.out.println(x);
    obj.change(obj);
    System.out.println(x);

}

}

Output: 50 100