bridgeorder.java

是一款用JAVA 编写的编译器 具有很强的编译功能

/*
 * Copyright 2003 Sun Microsystems, Inc.  All Rights Reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * This code is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 only, as
 * published by the Free Software Foundation.
 *
 * This code is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
 * You should have received a copy of the GNU General Public License version
 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
 * CA 95054 USA or visit www.sun.com if you need additional information or
 * have any questions.
 */

/*
 * @test
 * @bug 4856981
 * @summary generics: overridden method gets invoked (bridge method problem)
 * @author gafter
 *
 * @compile -source 1.5 BridgeOrder.java
 * @run main BridgeOrder
 */

interface A<T> {
    public void f(T x);
}

class X {
}

// Moving class B here makes the problem go away

class C<T extends X> extends B<T> implements A<T> {
 
// This also makes the problem go away.
/*
  public void f(T x) {
    super.f(x);
  } */
}

class B<T extends X> implements A<T> {
    public void f(T x) {
	System.out.println("B.f()");
    }
}

class D extends C<X> {
    public void f(X y) {
	System.out.println("D.f()");
    }
}

public class BridgeOrder {
    public static void main(String args[]) {
	A<X> x = new D();
	x.f(new X());
    }
}