jdk8-mips64-public/langtools: test/tools/javac/CaptureInSubtype.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 5044157

    27  * @summary type system loophole in wildcard substitution

    28  * @author Gilad Bracha

    29  *

    30  * @compile/fail CaptureInSubtype.java

    31  */

    33 import java.util.List;

    34 import java.util.ArrayList;

    36 public class CaptureInSubtype {

    38     static class SuperOfFlaw<S>{

    39         S s;

    40         S get() { return s;}

    41         void put(S a) { s = a;}

    43         SuperOfFlaw(S a) { s = a;}

    44     }

    46     static class Flaw<T> extends SuperOfFlaw<List<T>> {

    47         List<T> fetch(){return s;}

    49         Flaw(T t){super(new ArrayList<T>()); s.add(t);}

    50     }

    52     static class SuperOfShowFlaw {

    54         SuperOfFlaw<List<?>> m(){return null;}

    55     }

    58     public static class ShowFlaw extends SuperOfShowFlaw {

    59         static Flaw<Number> fn =  new Flaw<Number>(new Integer(3));

    61         Flaw<?> m(){return fn;}

    62     }

    64     public static void main(String[] args) {

    65         SuperOfShowFlaw sosf = new ShowFlaw();

    66         SuperOfFlaw<List<?>> sof = sosf.m();

    67         List<String> ls = new ArrayList<String>();

    68         ls.add("Smalltalk rules!");

    69         sof.put(ls);

    70         Number n = ShowFlaw.fn.get().get(0);

    71     }

    73 }

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