DOS命令行下显示以下内容:
Exception in thread "AWT-EventQueue-0" java.lang.NullPointerException
at sun.awt.shell.Win32ShellFolder2.getFileSystemPath(Win32ShellFolder2.j
ava:571)
at sun.awt.shell.Win32ShellFolder2.access$400(Win32ShellFolder2.java:72)
at sun.awt.shell.Win32ShellFolder2$10.call(Win32ShellFolder2.java:749)
at sun.awt.shell.Win32ShellFolder2$10.call(Win32ShellFolder2.java:740)
at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:334)
at java.util.concurrent.FutureTask.run(FutureTask.java:166)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.
java:1110)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor
.java:603)
at sun.awt.shell.Win32ShellFolderManager2$ComInvoker$3.run(Win32ShellFol
derManager2.java:502)
at java.lang.Thread.run(Thread.java:722)