this and super

class FatherClass {
    public int value;
    public void f() {
        value = 100;
        System.out.println("FatherClass,value = " + value);
    }
}

class ChildClass extends FatherClass {
    public int value;
    public void f() {
        super.f();
        value = 200;
        System.out.println("ChildClass,value = " + value);
        System.out.println(value);
        System.out.println(super.value);
    }
}

public class Demo {
    public static void main(String[] args) {
        ChildClass cc = new ChildClass();
        cc.f();
    }
}