How does the “this” keyword in Java inheritance work?

Question

In the below code snippet, the result is really confusing.

public class TestInheritance {
    public static void main(String[] args) {
        new Son();
                


        

Answer 1

All member functions are polymorphic in Java by default. That means when you call this.toString() Java uses dynamic binding to resolve the call, calling the child version. When you access the member x, you access the member of your current scope (the father) because members are not polymorphic.