Is this right?

Question

So I read this today and couldent really make sense of it.

3)third difference is that
inner class can modify data members of the outer class whereas subclasses cannot..
______________________________________________

Wouldent this example be a subclass modifying its parents data ?

//let's say parent as a field String x = "blabla"

void changeSuper(){
super.x="Hello";
};

Answer 1

You're correct and they're wrong unless they're referring to private properties and methods specifically. They should have said "inner class can modify PRIVATE data members..."

This compiles but a subclass won't have the same direct access to the private x property defined below:
import java.awt.event.*;

public class Test {
private int x;

Test() {
Object o = new ActionListener() {
public void actionPerformed(ActionEvent ae) {
Test.this.x = 3;
}
};
}
}

Answer 2

There is a lot of correct information on Java but definitely Oracle's official documentation is more reliable. Anyone can make mistakes but the owner of Java will make fewer mistakes on Java.

Here is one of Oracle's tutorials on inner classes:
https://docs.oracle.com/javase/tutorial/java/javaOO/innerclasses.html

Answer 3

Josh Greig that's what thought, I understand that creating a variable in subclass that as the same name as parent wont modify the parent variable but also wont be polymophic, I'll try this with a nested class to see what the diffrenece is because I think it has somthing to do with that, I really should say away from google it always trying to confuse me 😁