UncheckedCovariance.java

/*
 * Copyright 2003 Sun Microsystems, Inc.  All Rights Reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
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 * 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.
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/*
 * @test
 * @bug 4949303
 * @summary A method returning a raw type cannot override a method returning a generic type
 * @author gafter
 *
 * @compile -source 1.5 UncheckedCovariance.java
 * @compile/fail -Xlint:unchecked -Werror -source 1.5 UncheckedCovariance.java
 */

class UncheckedCovariance {
    static class Box<T> { }
    static class A {
        Box<Integer> f() { return null; }
    }
    static class B extends A {
        Box f() { return null; }
    }
}