"This is changeable, it follows the thing after 'new', while 'super' is fixed."
"In the parent class: when 'this' is used, it refers to the instance created by 'new'. However, 'super' always refers to the direct parent class in a fixed manner."
```java
// Parent class
class FatherClass {
public int value;
public void f() {
this.run(); // Note that 'this' is used here. Pay attention.
}
public void run() {
System.out.println("FatherClass run method");
}
}
```
In the above code:
- `this` refers to the current object of `FatherClass` (or its subclass if instantiated as such).
- If there were a subclass and you used `super`, it would explicitly refer to the `FatherClass` version of methods or variables.