1 /*
2  * Copyright (c) 2016, 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
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22  */
23 
24 package test.java.util.Properties;
25 
26 import java.util.Enumeration;
27 import java.util.Properties;
28 import java.util.concurrent.CompletableFuture;
29 
30 /*
31  * @test
32  * @bug 8029891
33  * @summary Test Properties methods that do not synchronize any more
34  * @run main CheckUnsynchronized
35  */
36 public class CheckUnsynchronized {
main(String[] args)37     public static void main(String[] args) {
38         Properties props = new Properties();
39         synchronized (props) {
40             props.setProperty("key", "value");
41             System.out.println("contains(value)? " +
42                     CompletableFuture.supplyAsync(() -> props.contains("value")).join());
43             System.out.println("containsKey(key)? " +
44                     CompletableFuture.supplyAsync(() -> props.containsKey("key")).join());
45             System.out.println("containsValue(value)? " +
46                     CompletableFuture.supplyAsync(() -> props.containsValue("value")).join());
47             Enumeration<Object> elems =
48                     CompletableFuture.supplyAsync(() -> props.elements()).join();
49             System.out.println("first value from elements(): " + elems.nextElement());
50             System.out.println("value from get(): " +
51                     CompletableFuture.supplyAsync(() -> props.getProperty("key")).join());
52             System.out.println("getOrDefault(\"missing\"): " +
53                     CompletableFuture.supplyAsync(() -> props.getOrDefault("missing", "default")).join());
54             System.out.println("isEmpty()? " +
55                     CompletableFuture.supplyAsync(() -> props.isEmpty()).join());
56             Enumeration<Object> keys =
57                     CompletableFuture.supplyAsync(() -> props.keys()).join();
58             System.out.println("first key from keys(): " + keys.nextElement());
59             System.out.println("size(): " +
60                     CompletableFuture.supplyAsync(() -> props.size()).join());
61         }
62     }
63 }
64