missingbridge.java

来自「是一款用JAVA 编写的编译器 具有很强的编译功能」· Java 代码 · 共 61 行

/*
 * Copyright 2004 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 5021445
 * @summary Calling inherited generics method via interface causes AbstractMethodError
 * @author gafter
 *
 * @compile -source 1.5 MissingBridge.java
 * @run main MissingBridge
 */

class GenObject<T>
{
    public void foo(T obj)
    {
        System.out.println("obj = "+obj);
    }
}

interface TestInterface
{
    void foo(String blah);
}

public class MissingBridge extends GenObject<String> implements TestInterface
{
    public static void main(String[] args)
    {
        MissingBridge test = new MissingBridge();
        TestInterface test2 = test;

        // works
        test.foo("blah");

        // fails with AbstractMethodError
        test2.foo("blah");
    }
}