Write a regression test for [JDK-4400728](https://bugs.openjdk.java.net/browse/JDK-4400728)
Issue: JFileChooser constructors by default set current directory to the "Desktop" value on Windows, but should use 'My Documents' property instead, also user.home for unix platforms. javadoc says: "public JFileChooser() Constructs a JFileChooser pointing to the user's default directory. This default depends on the operating system. It is typically the 'My Documents' folder on Windows, and the user's home directory on Unix. " See this https://docs.oracle.com/en/java/javase/17/docs/api/java.desktop/javax/swing/JFileChooser.html#%3Cinit%3E() Testing: 1. Tested using Mach5(20 times per platform) in macos,linux and windows and got all pass. 2. Tested in original failed Java version and the fixed version; Java 1.4.0 -> Test Failed. $ j2sdk1.4.0/bin/java JFileChooserDefaultDirectoryTest java.lang.NullPointerException at java.io.File.<init>(File.java:180) at sun.awt.shell.Win32ShellFolder.listFiles(Win32ShellFolder.java:517) at sun.awt.shell.Win32ShellFolderManager.get(Win32ShellFolderManager.java:152) at sun.awt.shell.ShellFolder.get(ShellFolder.java:208) at javax.swing.plaf.metal.MetalFileChooserUI.installComponents(MetalFileChooserUI.java:310) at javax.swing.plaf.basic.BasicFileChooserUI.installUI(BasicFileChooserUI.java:130) at javax.swing.plaf.metal.MetalFileChooserUI.installUI(MetalFileChooserUI.java:152) at javax.swing.JComponent.setUI(JComponent.java:445) at javax.swing.JFileChooser.updateUI(JFileChooser.java:1701) at javax.swing.JFileChooser.setup(JFileChooser.java:345) at javax.swing.JFileChooser.<init>(JFileChooser.java:320) at javax.swing.JFileChooser.<init>(JFileChooser.java:273) at JFileChooserDefaultDirectoryTest.main(JFileChooserDefaultDirectoryTest.java:15) Exception in thread "main" Java 1.5.0 -> Test Passed. $ jdk1.5.0/bin/java JFileChooserDefaultDirectoryTest UserHome dir = C:\Users\jpgansible Test Passed Java 1.8.0 -> Test Passed. $ jdk1.8.0_331/bin/java JFileChooserDefaultDirectoryTest UserHome dir = C:\Users\jpgansible Test Passed ------------- Commit messages: - 8283621: Write a regression test for CCC4400728 Changes: https://git.openjdk.java.net/jdk/pull/7942/files Webrev: https://webrevs.openjdk.java.net/?repo=jdk&pr=7942&range=00 Issue: https://bugs.openjdk.java.net/browse/JDK-8283621 Stats: 71 lines in 1 file changed: 71 ins; 0 del; 0 mod Patch: https://git.openjdk.java.net/jdk/pull/7942.diff Fetch: git fetch https://git.openjdk.java.net/jdk pull/7942/head:pull/7942 PR: https://git.openjdk.java.net/jdk/pull/7942
