jdk8-mips64-public/langtools: test/tools/javac/mixedTarget/ExtendCovariant2.java@7909abb85562

     1 /*

     2  * Copyright (c) 2004, Oracle and/or its affiliates. All rights reserved.

     3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

     4  *

     5  * This code is free software; you can redistribute it and/or modify it

     6  * under the terms of the GNU General Public License version 2 only, as

     7  * published by the Free Software Foundation.

     8  *

     9  * This code is distributed in the hope that it will be useful, but WITHOUT

    10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

    11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

    12  * version 2 for more details (a copy is included in the LICENSE file that

    13  * accompanied this code).

    14  *

    15  * You should have received a copy of the GNU General Public License version

    16  * 2 along with this work; if not, write to the Free Software Foundation,

    17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

    18  *

    19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

    20  * or visit www.oracle.com if you need additional information or have any

    21  * questions.

    22  */

    24 /*

    25  * @test

    26  * @bug 5009712

    27  * @summary 1.4 javac should not accept the Covariant Return Type

    28  * @author gafter

    29  *

    30  * @compile/fail -source 1.4 ExtendCovariant2.java

    31  * @compile                  ExtendCovariant2.java

    32  */

    34 /**

    35  * java.io.PrintStream java.io.PrintStream.append(char)

    36  *

    37  * overrides

    38  *

    39  * java.lang.Appendable java.lang.Appendable.append(char)

    40  *

    41  * Yet javac should allow extending PrintStream, as long as the user

    42  * doesn't directly override a covariant method in -source 1.4.

    43  **/

    44 public class ExtendCovariant2 extends java.io.PrintStream {

    45     ExtendCovariant2() throws java.io.IOException {

    46         super("");

    47     }

    48     public java.io.PrintStream append(char c) {

    49         return this;

    50     }

    51 }

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