package Polymorphie;


public class WS1617 {
    
    public static void main(String[] args) {
        
        class A {
            public void print() { System.out.print("A+"); this.print(this); }
            public void print(A a) { System.out.print("M+"); }
        }

        class B extends A {
            public void print() { System.out.print("B+"); }
            public void print(A a) { System.out.print("X+"); }
            public void print(B b) { System.out.print("Y+"); super.print((A)b); }
        }

        A a = new A();
        B b = new B();
        
        a.print(a);             // Statement 1                                  -> M+
        b.print(b);             // Statement 2                                  -> Y+M+
        a.print();              // Statement 3                                  -> A+M+
        a.print((A)b);          // Statement 4                                  -> M+
        ((B)a).print((A)b);     // Statement 5                                  -> ClassCastException
        
        a = b;
        ((A)a).print(b);        // Statement 6                                  -> X+
        ((B)a).print(b);        // Statement 7                                  -> Y+M+
        b.print(a);             // Statement 8                                  -> X+
        
    }
}