/* * 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 mulitple interfaces when the methods have compatible return types * @compile Test1.java */ import java.util.*; interface A { List getList(); } interface B { List getList(); } interface AB extends A, B {} //return type: List interface C { List getList(); } interface BC extends B, C {} //return type: List interface D { Number m(); } interface E { Double m(); } interface DE extends D, E {} //return type: Double interface F { ArrayList getList(); } interface G { Collection getList(); } interface AG extends A, G{}; //return type: List interface CF extends C, F {} //return type: ArrayList interface CG extends C, G {} //return type: List interface H { Iterable getList(); } interface CH extends C, H {} //return type: List interface CFGH extends C, F, G, H {} //return type: ArrayList class Test1 { //raw and typed return types: void test(AB ab) { Number n = ab.getList().get(1); } void test(BC bc) { String s = bc.getList().get(1); } void testRaw(BC bc) { List list = bc.getList(); } void testWildCard(BC bc) { List list = bc.getList(); } void testGeneric(BC bc) { T t = bc.getList().get(1); } //covariant return: void test(DE de) { Double d = de.m(); } //mixed: void test(AG ag) { Number n = ag.getList().get(0); } void test(CF cf) { ArrayList list = cf.getList(); } void test(CG cg) { String s = cg.getList().get(0); } void test(CH ch) { String s = ch.getList().get(0); } void test(CFGH cfgh) { ArrayList list = cfgh.getList(); } void testWildCard(CFGH cfgh) { ArrayList list = cfgh.getList(); } }