| /* |
| * 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 5044157 |
| * @summary type system loophole in wildcard substitution |
| * @author Gilad Bracha |
| * |
| * @compile/fail CaptureInSubtype.java |
| */ |
| |
| import java.util.List; |
| import java.util.ArrayList; |
| |
| public class CaptureInSubtype { |
| |
| static class SuperOfFlaw<S>{ |
| S s; |
| S get() { return s;} |
| void put(S a) { s = a;} |
| |
| SuperOfFlaw(S a) { s = a;} |
| } |
| |
| static class Flaw<T> extends SuperOfFlaw<List<T>> { |
| List<T> fetch(){return s;} |
| |
| Flaw(T t){super(new ArrayList<T>()); s.add(t);} |
| } |
| |
| static class SuperOfShowFlaw { |
| |
| SuperOfFlaw<List<?>> m(){return null;} |
| } |
| |
| |
| public static class ShowFlaw extends SuperOfShowFlaw { |
| static Flaw<Number> fn = new Flaw<Number>(new Integer(3)); |
| |
| Flaw<?> m(){return fn;} |
| } |
| |
| public static void main(String[] args) { |
| SuperOfShowFlaw sosf = new ShowFlaw(); |
| SuperOfFlaw<List<?>> sof = sosf.m(); |
| List<String> ls = new ArrayList<String>(); |
| ls.add("Smalltalk rules!"); |
| sof.put(ls); |
| Number n = ShowFlaw.fn.get().get(0); |
| } |
| |
| } |