NewTest.java revision 289:d4828eba4939
1/* 2 * Copyright 2005-2007 Sun Microsystems, Inc. All Rights Reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, 20 * CA 95054 USA or visit www.sun.com if you need additional information or 21 * have any questions. 22 */ 23 24/** 25 * @test 26 * @bug 6365166 27 * @summary javac (generic) unable to resolve methods 28 * @compile NewTest.java 29 */ 30 31import java.util.*; 32 33public class NewTest<A,B> { 34 private List<A> toAdd; 35 36 public NewTest(List<A> toAdd) { 37 this.toAdd = toAdd; 38 } 39 40 private List<A> getRelated(B b) { 41 //some application logic 42 //for demo 43 return toAdd; 44 } 45 46 @SuppressWarnings("unchecked") 47 public <L extends List<? super A>,LF extends Factory<L>> L addOrCreate4(B b,L l,LF lf) { 48 if (l == null) { 49 l = lf.create(); 50 } 51 ((List<? super A>)l).addAll(getRelated(b)); //to get round the compiler bug 52 return l; 53 } 54 55 public static class ListFactory<T> implements Factory<List<T>>{ 56 public List<T> create() { 57 return new ArrayList<T>(); 58 } 59 } 60 public static interface Factory<T> { 61 public T create(); 62 } 63 64 public static void main(String ... args) { 65 ListFactory<Number> lf = new ListFactory<Number>(); 66 List<Long> longs = new ArrayList<Long>(); 67 longs.add(new Long(1)); 68 NewTest<Long,Number> test = new NewTest<Long,Number>(longs); 69 70 List<Number> ret4 = null; 71 72 ret4 = test.addOrCreate4(1, ret4,lf); 73 74 } 75} 76