| /* |
| * Copyright (c) 2012, Oracle and/or its affiliates. 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| |
| /** |
| * @test |
| * @bug 7062745 7157798 |
| * @summary Test inheritance of same-name methods from multiple interfaces |
| when the methods have compatible parameter types and return types |
| * @compile Test2.java |
| */ |
| |
| import java.util.*; |
| |
| interface A { void m(Map map); } |
| interface B { void m(Map<Number, String> map); } |
| |
| interface AB extends A, B {} //paramter type: Map<Number, String> |
| |
| interface C<K, V> { List<V> getList(Map<K, V> map); } |
| interface D { ArrayList getList(Map map); } |
| |
| interface CD<K, V> extends C<K, V>, D {} //paramter type: Map<K, V> |
| |
| interface E<T> { T get(List<?> list); } |
| interface F<T> { T get(List list); } |
| |
| interface EF<T1, T2 extends T1> extends E<T1>, F<T2> {} //parameter type: List<?> |
| |
| class Test2 { |
| |
| //compatible parameter types: |
| void test(AB ab) { |
| ab.m(new HashMap<Number, String>()); |
| } |
| |
| //compatible parameter types and return types: |
| void testRaw(CD cd) { //return type: ArrayList |
| ArrayList al = cd.getList(new HashMap()); |
| } |
| |
| <K, V> void testGeneric(CD<K, V> cd) { //return type: List<V> |
| V v = cd.getList(new HashMap<K, V>()).get(0); |
| } |
| |
| void test(CD<Number, String> cd) { //return type: List<String> |
| String s = cd.getList(new HashMap<Number, String>()).get(0); |
| } |
| |
| void test(EF<Number, Integer> ef) { //return type: Number |
| Number n = ef.get(new ArrayList<Integer>()); |
| } |
| |
| <T, U extends T> void testGeneric(EF<T, U> ef) { //return type: T |
| T t = ef.get(new ArrayList<U>()); |
| } |
| } |