// INHERIT9: more about method calls. What's the rule?
// Each method "sends" information back to the object that called the
// method. Even when calling methods from a superclass, the subclass
// will treat any methods or instance variables inside the
// superclass's implementation as if they were written inside the subclass.

// So, Use $super$ to call a method from a superclass.
// Methods called inside the superclass's method will act as if they were
// called from the subclass!

public class inherit9 {
    public static void main(String[] args) {
	(new Test2("Lalala")).sound();
    }
}
	
class Test1 {
    String s;
    Test1(String s) { 
	this.s = s;
    }
    void sound() { 
	print();               
    }
    void print() { 
	System.out.println(s);
    }
}

class Test2 extends Test1 {
    Test2(String s) { 
	super(s);               
    }
    void sound() {
        // call $print$ from class $Test2$
	print();
	// call $print$ from class $Test1$ but use information visible
	// to class $Test1$. Java treats this method call as if the
	// invocation happened "inside" the object created from $Test1$.
	super.sound();
    }
    void print() { 
	System.out.println(s);
    }
}

/* output:
Lalala
Lalala
*/