[DrJava] [ drjava-Bugs-774896 ] Bad CLI Filename throws NullPointerException

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Bugs item #774896, was opened at 2003-07-21 04:30
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Category: User interface
Group: None
Status: Open
Resolution: None
Priority: 5
Submitted By: Peter Centgraf (centgraf)
Assigned to: Nobody/Anonymous (nobody)
Summary: Bad CLI Filename throws NullPointerException

Initial Comment:
Attempting to open a file at the command line which does 
not exist will throw a NullPointerException.  This gets 
wrapped as an UnexpectedException in DrJava.java, but 
here's the original stack trace:

 java.lang.NullPointerException
	at javax.swing.filechooser.FileSystemView.
getParentDirectory(FileSystemView.java:457)
	at javax.swing.JFileChooser.
setCurrentDirectory(JFileChooser.java:537)
	at edu.rice.cs.drjava.ui.MainFrame.
_setCurrentDirectory(MainFrame.java:3215)
	at edu.rice.cs.drjava.ui.MainFrame.
_setCurrentDirectory(MainFrame.java:3229)
	at edu.rice.cs.drjava.ui.MainFrame.
access$7800(MainFrame.java:93)
	at edu.rice.cs.drjava.ui.MainFrame$ModelListener.
activeDocumentChanged(MainFrame.java:3760)
	at edu.rice.cs.drjava.model.SingleDisplayModel$1.
notifyListener(SingleDisplayModel.java:502)
...


I think we just need to add some additional safety checks 
for this case.

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