1/* 2 * Copyright (c) 2008, 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 6688203 26 @summary Memory leak and performance problems in the method getFileSystemView of FileSystemView 27 @author Pavel Porvatov 28 @modules java.desktop/javax.swing.filechooser:open 29 @run main bug6688203 30*/ 31 32import javax.swing.*; 33import javax.swing.filechooser.FileSystemView; 34import java.io.File; 35import java.lang.reflect.Field; 36 37public class bug6688203 { 38 public static void main(String[] args) { 39 // Create an instance of FileSystemView 40 FileSystemView.getFileSystemView(); 41 42 int startCount = UIManager.getPropertyChangeListeners().length; 43 44 for (int i = 0; i < 100; i++) { 45 FileSystemView.getFileSystemView(); 46 } 47 48 if (startCount != UIManager.getPropertyChangeListeners().length) { 49 throw new RuntimeException("New listeners were added into UIManager"); 50 } 51 52 FileSystemView fileSystemView = FileSystemView.getFileSystemView(); 53 File file = new File("Some file"); 54 55 for (UIManager.LookAndFeelInfo lafInfo : UIManager.getInstalledLookAndFeels()) { 56 try { 57 UIManager.setLookAndFeel(lafInfo.getClassName()); 58 } catch (Exception e) { 59 // Ignore such errors 60 System.out.println("Cannot set LAF " + lafInfo.getName()); 61 62 continue; 63 } 64 65 fileSystemView.getSystemDisplayName(file); 66 67 try { 68 Field field = FileSystemView.class.getDeclaredField("useSystemExtensionHiding"); 69 70 field.setAccessible(true); 71 72 Boolean value = field.getBoolean(fileSystemView); 73 74 if (value != UIManager.getDefaults().getBoolean("FileChooser.useSystemExtensionHiding")) { 75 throw new RuntimeException("Invalid cached value of the FileSystemView.useSystemExtensionHiding field"); 76 } 77 } catch (Exception e) { 78 throw new RuntimeException("Cannot read the FileSystemView.useSystemExtensionHiding field", e); 79 } 80 } 81 } 82} 83