java.lang.NullPointerException
        at javax.swing.filechooser.FileSystemView.getFiles(FileSystemView.java:434)
        at javax.swing.plaf.basic.BasicDirectoryModel$LoadFilesThread$1.call(BasicDirectoryModel.java:225)
        at javax.swing.plaf.basic.BasicDirectoryModel$LoadFilesThread$1.call(BasicDirectoryModel.java:221)
        at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:303)
        at java.util.concurrent.FutureTask.run(FutureTask.java:138)
        at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:885)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:907)
        at sun.awt.shell.Win32ShellFolderManager2$ComInvoker$3.run(Win32ShellFolderManager2.java:458)
        at java.lang.Thread.run(Thread.java:619)