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