62 lines
1.8 KiB
Java
62 lines
1.8 KiB
Java
/*
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* Copyright (c) 2006, 2007, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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/*
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* @test
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* @bug 6468384 6278587
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* @summary Problem with underconstrained type variables
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* @compile T6468384.java
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*/
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import java.util.*;
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public class T6468384 {
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public class A {};
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public class B extends A {};
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public <T, V extends T> Set<T> newSet(V... objects) {
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Set<T> set = new LinkedHashSet<T>();
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for (T t : objects) {
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set.add(t);
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}
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return set;
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}
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public static void main(String... args) {
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T6468384 g = new T6468384();
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// B << V => V :> B
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// so B is inferred for V
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// Then consider the return type:
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// Set<A> >> Set<T> => A = T
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// So A is inferred for T
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Set<A> set1 = g.newSet(g.new B());
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Set<A> set2 = g.<A,B>newSet(g.new B());
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}
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}
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