1 /*
2  * Copyright (c) 2011, Oracle and/or its affiliates. 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20  * or visit www.oracle.com if you need additional information or have any
21  * questions.
22  */
23 
24 /*
25  * Portions Copyright (c) 2011 IBM Corporation
26  */
27 
28 /*
29  * @test
30  * @bug 6312706
31  * @summary Iterator.remove() from Map.entrySet().iterator() invalidates returned Entry.
32  * @author Neil Richards <neil.richards@ngmr.net>, <neil_richards@uk.ibm.com>
33  */
34 
35 package test.java.util.IdentityHashMap;
36 
37 import java.util.IdentityHashMap;
38 import java.util.Iterator;
39 import java.util.Map;
40 
41 public class EntrySetIteratorRemoveInvalidatesEntry {
42 
main(String[] args)43     public static void main(String[] args) throws Exception {
44         final IdentityHashMap<String, String> identityHashMap =
45             new IdentityHashMap<>();
46 
47         identityHashMap.put("One", "Un");
48         identityHashMap.put("Two", "Deux");
49         identityHashMap.put("Three", "Trois");
50 
51         Iterator<Map.Entry<String, String>> entrySetIterator =
52             identityHashMap.entrySet().iterator();
53         Map.Entry<String, String> entry = entrySetIterator.next();
54 
55         entrySetIterator.remove();
56 
57         try {
58             entry.getKey();
59             throw new RuntimeException("Test FAILED: Entry not invalidated by removal.");
60         } catch (Exception e) { }
61     }
62 }
63