castfail5.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 4916607
 * @summary Test casts (legal, warning, and errors)
 * @author gafter
 *
 * @compile/fail -source 1.5 CastFail5.java
 */

import java.util.*;

class CastTest {

    // --- Directly transferring parameters ---

    private class AA<T> { }

    private class AB<T> extends AA<T> { }
    private class AC<T> extends AA<Vector<T>> { }
    private class AD<T> extends AA<Vector<? extends T>> { }
    private class AE<T> extends AA<Vector<? super T>> { }
    private class AF<T> extends AA<T[]> { }
    private class AG<T> extends AA<String> { }

    private void parameterTransfer() {
	Object o;

	o = (AE<Number>) (AA<Vector<? super String>>) null; // <<fail 5>>
    }

}