1/*
2 * Copyright (c) 2003, 2004, 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/* @test
25 * @bug 4189011 5019303
26 * @summary Test opening over 2048 files
27 * @run main/timeout=300 ManyFiles
28 */
29
30import java.io.*;
31import java.util.*;
32
33public class ManyFiles {
34    static int count;
35    static List files = new ArrayList();
36    static List streams = new ArrayList();
37    static int NUM_FILES = 2050;
38
39    public static void main(String args[]) throws Exception {
40        // Linux does not yet allow opening this many files; Solaris
41        // 8 requires an explicit allocation of more file descriptors
42        // to succeed. Since this test is written to check for a
43        // Windows capability it is much simpler to only run it
44        // on that platform.
45        String osName = System.getProperty("os.name");
46        if (osName.startsWith("Linux")||osName.startsWith("SunOS"))
47            return;
48
49        for (int n = 0; n < NUM_FILES; n++) {
50            File f = new File("file" + count++);
51            files.add(f);
52            streams.add(new FileOutputStream(f));
53        }
54
55        Iterator i = streams.iterator();
56        while(i.hasNext()) {
57            FileOutputStream fos = (FileOutputStream)i.next();
58            fos.close();
59        }
60
61        i = files.iterator();
62        while(i.hasNext()) {
63            File f = (File)i.next();
64            f.delete();
65        }
66    }
67}
68