--- old/src/java.desktop/windows/classes/sun/awt/shell/Win32ShellFolderManager2.java 2018-01-10 17:53:54.772720400 +0530 +++ new/src/java.desktop/windows/classes/sun/awt/shell/Win32ShellFolderManager2.java 2018-01-10 17:53:53.410530400 +0530 @@ -448,7 +448,7 @@ Win32ShellFolder2 sf = (Win32ShellFolder2)dir; return (sf.isFileSystem() && sf.parent != null && - sf.parent.equals(Win32ShellFolder2.listRoots())); + sf.parent.equals(getDrives())); } String path = dir.getPath(); --- /dev/null 2018-01-10 17:54:03.000000000 +0530 +++ new/test/jdk/javax/swing/JFileChooser/8194044/FileSystemRootTest.java 2018-01-10 17:54:02.216719900 +0530 @@ -0,0 +1,56 @@ +/* + * Copyright (c) 2010, 2018, Oracle and/or its affiliates. All rights reserved. + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. + * + * This code is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License version 2 only, as + * published by the Free Software Foundation. + * + * This code is distributed in the hope that it will be useful, but WITHOUT + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License + * version 2 for more details (a copy is included in the LICENSE file that + * accompanied this code). + * + * You should have received a copy of the GNU General Public License version + * 2 along with this work; if not, write to the Free Software Foundation, + * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. + * + * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA + * or visit www.oracle.com if you need additional information or have any + * questions. + */ + +/* @test + * @bug 8194044 + * @summary Test if Win32ShellFolder2 root folder object gets identified as such. + * @requires os.family=="windows" + * @modules java.desktop/sun.awt.shell + * @run main FileSystemRootTest +*/ + +import sun.awt.shell.ShellFolder; +import javax.swing.filechooser.FileSystemView; +import java.io.File; +import java.util.stream.IntStream; + +public class FileSystemRootTest { + public static void main(String[] args) throws Exception { + FileSystemView fileSystemView = FileSystemView.getFileSystemView(); + + IntStream.range(0, 50).forEach(i -> { + /*This is the only way to get the Win32ShellFolder2 object, since it is + *an internal class, which cannot be instantiated directly. + *On windows, this returns "C:\Users\\Documents" + */ + File def = fileSystemView.getDefaultDirectory(); + File root = fileSystemView.getParentDirectory( + fileSystemView.getParentDirectory( + fileSystemView.getParentDirectory(def))); + + if (! (root instanceof ShellFolder && ShellFolder.isFileSystemRoot(root))) { + throw new RuntimeException("Test failed: root drive reported as false"); + } + }); + } +}