public class CallWhat {
  public static void main (String[] args) {
    System.out.println ("Test 1:");
    System.out
        .println ("[Child a = new Child (1, 1); Child b = new Child (1, 2)]");
    Child a = new Child (1, 1);
    Child b = new Child (1, 2);

    System.out.println ("a.sequals (b) : " + a.traceableEquals (b));
    System.out.println ("b.traceableEquals (a) : " + b.traceableEquals (a));

    System.out.println ("");
    System.out.println ("Test 2:   ");

    System.out.println ("[Root x = a; Root y = b]");
    Root x = a;
    Root y = b;

    System.out.println ("a.traceableEquals (y): " + a.traceableEquals (y));
    System.out.println ("a.traceableEquals (x): " + a.traceableEquals (x));
    System.out.println ("b.traceableEquals (y): " + b.traceableEquals (y));
    System.out.println ("b.traceableEquals (x): " + b.traceableEquals (x));

    System.out.println ("Test 2, reversed:");
    System.out.println ("y.traceableEquals (b): " + y.traceableEquals (b));
    System.out.println ("y.traceableEquals (a): " + y.traceableEquals (a));
    System.out.println ("x.traceableEquals (b): " + x.traceableEquals (b));
    System.out.println ("x.traceableEquals (a): " + x.traceableEquals (a));

    System.out.println ("Test 3:");
    System.out.println ("x.traceableEquals (y): " + x.traceableEquals (y));
    System.out.println ("y.traceableEquals (x): " + y.traceableEquals (x));

  }
}

class Root {
  private int i;

  public Root (int i) {
    this.i = i;
  }

  public boolean traceableEquals (Root r) {
    System.out.println ("In Root#traceableEquals (Root r):");
    System.out.println ("  My real class is: " + getClass ());
    System.out.println ("  r's real class is: " + r.getClass ());

    return this.i == r.i;
  }
}

class Child extends Root {
  private int j;

  public Child (int i, int j) {
    super (i);
    this.j = j;
  }

  public boolean tracableEquals (Child c) {
    System.out.println ("In Child#traceableEquals (Child c):");
    System.out.println ("  My real class is: " + getClass ());
    System.out.println ("  c's real class is: " + c.getClass ());
    boolean parentEquality = super.traceableEquals (c);

    System.out.println ("  Superclass equality test returned: "
        + parentEquality);

    return parentEquality && this.j == c.j;
  }
}