Java method overloading + double dispatch
- by Max
Can anybody explain in detail the reason the overloaded method print(Parent parent) is invoked when working with Child instance in my test piece of code?
Any pecularities of virtual methods or methods overloading/resolution in Java involved here?
Any direct reference to Java Lang Spec?
Which term describes this behaviour?
Thanks a lot.
public class InheritancePlay {
public static class Parent {
public void doJob(Worker worker) {
System.out.println("this is " + this.getClass().getName());
worker.print(this);
}
}
public static class Child extends Parent {
}
public static class Worker {
public void print(Parent parent) {
System.out.println("Why this method resolution happens?");
}
public void print(Child child) {
System.out.println("This is not called");
}
}
public static void main(String[] args) {
Child child = new Child();
Worker worker = new Worker();
child.doJob(worker);
}
}
