1 /* 2 * Copyright (c) 2017, 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 /* 25 * @test 26 * @bug 8175015 27 * @summary FileSystemView.isDrive(File) memory leak on "C:\" file reference 28 * @modules java.desktop/sun.awt.shell 29 * @requires (os.family == "windows") 30 * @run main/othervm -Xmx8m FileSystemViewMemoryLeak 31 */ 32 import java.io.File; 33 import java.text.NumberFormat; 34 import javax.swing.filechooser.FileSystemView; 35 36 public class FileSystemViewMemoryLeak { 37 38 public static void main(String[] args) { 39 test(); 40 } 41 42 private static void test() { 43 44 File root = new File("C:\\"); 45 System.out.println("Root Exists: " + root.exists()); 46 System.out.println("Root Absolute Path: " + root.getAbsolutePath()); 47 System.out.println("Root Is Directory?: " + root.isDirectory()); 48 49 FileSystemView fileSystemView = FileSystemView.getFileSystemView(); 50 NumberFormat nf = NumberFormat.getNumberInstance(); 51 52 int iMax = 50000; 53 long lastPercentFinished = 0L; 54 for (int i = 0; i < iMax; i++) { 55 56 long percentFinished = Math.round(((i * 1000d) / (double) iMax)); 57 58 if (lastPercentFinished != percentFinished) { 59 double pf = ((double) percentFinished) / 10d; 60 String pfMessage = String.valueOf(pf) + " % (" + i + "/" + iMax + ")"; 61 62 long totalMemory = Runtime.getRuntime().totalMemory() / 1024; 63 long freeMemory = Runtime.getRuntime().freeMemory() / 1024; 64 long maxMemory = Runtime.getRuntime().maxMemory() / 1024; 65 String memMessage = "[Memory Used: " + nf.format(totalMemory) + 66 " kb Free=" + nf.format(freeMemory) + 67 " kb Max: " + nf.format(maxMemory) + " kb]"; 68 69 System.out.println(pfMessage + " " + memMessage); 70 lastPercentFinished = percentFinished; 71 } 72 73 boolean floppyDrive = fileSystemView.isFloppyDrive(root); 74 boolean computerNode = fileSystemView.isComputerNode(root); 75 76 // "isDrive()" seems to be the painful method... 77 boolean drive = fileSystemView.isDrive(root); 78 } 79 } 80 } 81