util/LinkedHashMap/EmptyMapIterator.java

/*
 * Copyright (c) 2001, 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 4473440
 * @summary iterators on collection views of empty map weren't fail-fast.
 */

import java.util.*;

public class EmptyMapIterator {
    public static void main(String[] args) throws Exception {
        HashMap map = new HashMap();
        Iterator iter = map.entrySet().iterator();
        map.put("key", "value");

        try {
            iter.next();
            throw new Exception("No exception thrown");
        } catch (ConcurrentModificationException e) {
        }
    }
}
Revision:	1.5
Committed:	Sun Jan 7 20:29:15 2018 UTC (6 years, 5 months ago) by jsr166
Branch:	MAIN
Changes since 1.4:	+1 -1 lines
Log Message:	remove self-assignment
#	User	Rev	Content
1	jsr166	1.1	/*
2	jsr166	1.2	* Copyright (c) 2001, Oracle and/or its affiliates. All rights reserved.
3	jsr166	1.1	* 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	jsr166	1.2	* 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	jsr166	1.1	*/
23
24	jsr166	1.3	/*
25	jsr166	1.1	* @test
26			* @bug 4473440
27			* @summary iterators on collection views of empty map weren't fail-fast.
28			*/
29
30			import java.util.*;
31
32			public class EmptyMapIterator {
33	jsr166	1.4	public static void main(String[] args) throws Exception {
34	jsr166	1.1	HashMap map = new HashMap();
35	jsr166	1.5	Iterator iter = map.entrySet().iterator();
36	jsr166	1.1	map.put("key", "value");
37
38			try {
39			iter.next();
40			throw new Exception("No exception thrown");
41			} catch (ConcurrentModificationException e) {
42			}
43			}
44			}