1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
|
/*
* Copyright (c) 2012, 2013, 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 7198904
* @summary Verify that cloned TreeMap gets new keyset
* @author david.buck@oracle.com
* @run main/othervm Clone
*/
import java.util.TreeMap;
public class Clone {
public static void main(String[] args) throws Exception {
TreeMap<String,Object> m1 = new TreeMap<String,Object>();
m1.put( "one", 1 );
m1.keySet();
TreeMap<String,Object> m2 = (TreeMap<String,Object>)m1.clone();
m1.put( "two", 2 );
m2.put( "three", 3 );
// iterate over the clone (m2) and we should get "one" and "three"
for( final String key : m2.keySet() ) {
if( !"one".equals( key ) && !"three".equals( key ) ) {
throw new IllegalStateException( "Unexpected key: " + key );
}
}
// iterate over the original (m1) and we should get "one" and "two"
for( final String key : m1.keySet() ) {
if( !"one".equals( key ) && !"two".equals( key ) ) {
throw new IllegalStateException( "Unexpected key: " + key );
}
}
}
}
|
