| /* |
| * Copyright 2006-2007 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 6468384 6278587 |
| * @summary Problem with underconstrained type variables |
| * @compile T6468384.java |
| */ |
| |
| import java.util.*; |
| |
| public class T6468384 { |
| |
| public class A {}; |
| |
| public class B extends A {}; |
| |
| public <T, V extends T> Set<T> newSet(V... objects) { |
| Set<T> set = new LinkedHashSet<T>(); |
| for (T t : objects) { |
| set.add(t); |
| } |
| return set; |
| } |
| |
| public static void main(String... args) { |
| T6468384 g = new T6468384(); |
| |
| // B << V => V :> B |
| // so B is inferred for V |
| |
| // Then consider the return type: |
| // Set<A> >> Set<T> => A = T |
| // So A is inferred for T |
| Set<A> set1 = g.newSet(g.new B()); |
| |
| Set<A> set2 = g.<A,B>newSet(g.new B()); |
| } |
| |
| } |