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 import java.util.IdentityHashMap;

    36 import java.util.Iterator;

    37 import java.util.Map;

    38 

    39 public class EntrySetIteratorRemoveInvalidatesEntry {

    40     public static void main(String[] args) throws Exception {

    41         final IdentityHashMap<String, String> identityHashMap =

    42             new IdentityHashMap<>();

    43 

    44         identityHashMap.put("One", "Un");

    45         identityHashMap.put("Two", "Deux");

    46         identityHashMap.put("Three", "Trois");

    47 

    48         Iterator<Map.Entry<String, String>> entrySetIterator =

    49             identityHashMap.entrySet().iterator();

    50         Map.Entry<String, String> entry = entrySetIterator.next();

    51 

    52         entrySetIterator.remove();

    53 

    54         try {

    55             entry.getKey();

    56             throw new RuntimeException("Test FAILED: Entry not invalidated by removal.");

    57         } catch (Exception e) { }

    58     }

    59 }