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 30 import java.io.*; 31 import java.util.*; 32 33 public 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 main(String args[])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