/*****************************************************/

// Methods
// + use the instance variables from the classes in
//   which the instance variables are written.
// + are accessed from the actual objects, not
//   the declared types of the references!
// + are copied into the subclass if public and
//   not overriden (written with same header in
//   the subclass)

// Constructor code (body of constructors):
// Acts like method -- accesses instance variables
// of class in which the constructor is written

class A {
    public int x;
    public A(int x) { 
	this.x = x;
	System.out.println("x from the A constr: "+x);
    }
    public void show() {System.out.println("x! "+x);}
}
class B extends A { 
    public B(int x) {
	super(x-1);
	this.x=x;
    }
}

public class inherit4 {
    public static void main(String[] args){
	
	System.out.println("\nTest 1:");
	B v1 = new B(2);
	System.out.println("v1 uses "+v1.getClass());
	System.out.println("accessing x: "+v1.x); 
	v1.show();

	System.out.println("\nTest 2:");
	A v2 = new B(2);
	System.out.println("v2 uses "+v2.getClass());
	System.out.println("accessing x: "+v2.x); 
	v2.show();
    }
}

/* sample output:
   Test 1:
   x from the A constr: 1
   v1 uses class B
   accessing x: 2
   x! 2
   
   Test 2:
   x from the A constr: 1
   v2 uses class B
   accessing x: 2
   x! 2
*/