JFileChooser issue

[zack chancery]

I have a working copy of my project in one folder and a carbon copy in another. however it will not run due to some access issue with the FileChooser. Its and applet so why am i not surprised?
here is the run time error

 java.security.AccessControlException: access denied (java.util.PropertyPermissio
n user.dir read)
        at java.security.AccessControlContext.checkPermission(AccessControlConte
xt.java:269)
        at java.security.AccessController.checkPermission(AccessController.java:
401)
        at java.lang.SecurityManager.checkPermission(SecurityManager.java:524)
        at java.lang.SecurityManager.checkPropertyAccess(SecurityManager.java:12
76)
        at java.lang.System.getProperty(System.java:573)
        at java.io.Win32FileSystem.getUserPath(Win32FileSystem.java:272)
        at java.io.Win32FileSystem.resolve(Win32FileSystem.java:288)
        at java.io.File.getAbsolutePath(File.java:459)
        at sun.awt.shell.Win32ShellFolder2.<init>(Win32ShellFolder2.java:191)
        at sun.awt.shell.Win32ShellFolder2.listFiles(Win32ShellFolder2.java:504)
 
        at sun.awt.shell.ShellFolder.listFiles(ShellFolder.java:115)
        at sun.awt.shell.Win32ShellFolderManager2.get(Win32ShellFolderManager2.j
ava:189)
        at sun.awt.shell.ShellFolder.get(ShellFolder.java:245)
        at javax.swing.plaf.metal.MetalFileChooserUI.updateUseShellFolder(MetalF
ileChooserUI.java:414)
        at javax.swing.plaf.metal.MetalFileChooserUI.installComponents(MetalFile
ChooserUI.java:304)
        at javax.swing.plaf.basic.BasicFileChooserUI.installUI(BasicFileChooserU
I.java:130)
        at javax.swing.plaf.metal.MetalFileChooserUI.installUI(MetalFileChooserU
I.java:152)
        at javax.swing.JComponent.setUI(JComponent.java:449)
        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 Tracer.<init>(Tracer.java:40)
        at Main.init(Main.java:22)
        at sun.applet.AppletPanel.run(AppletPanel.java:353)
        at java.lang.Thread.run(Thread.java:534)
 
H:\projectTransit>
 
H:\projectTransit>javac *.java
 
H:\projectTransit>appletviewer test.html
java.security.AccessControlException: access denied (java.util.PropertyPermissio
n user.dir read)
        at java.security.AccessControlContext.checkPermission(AccessControlConte
xt.java:269)
        at java.security.AccessController.checkPermission(AccessController.java:
401)
        at java.lang.SecurityManager.checkPermission(SecurityManager.java:524)
        at java.lang.SecurityManager.checkPropertyAccess(SecurityManager.java:12
76)
        at java.lang.System.getProperty(System.java:573)
        at java.io.Win32FileSystem.getUserPath(Win32FileSystem.java:272)
        at java.io.Win32FileSystem.resolve(Win32FileSystem.java:288)
        at java.io.File.getAbsolutePath(File.java:459)
        at sun.awt.shell.Win32ShellFolder2.<init>(Win32ShellFolder2.java:191)
        at sun.awt.shell.Win32ShellFolder2.listFiles(Win32ShellFolder2.java:504)
 
        at sun.awt.shell.ShellFolder.listFiles(ShellFolder.java:115)
        at sun.awt.shell.Win32ShellFolderManager2.get(Win32ShellFolderManager2.j
ava:189)
        at sun.awt.shell.ShellFolder.get(ShellFolder.java:245)
        at javax.swing.plaf.metal.MetalFileChooserUI.updateUseShellFolder(MetalF
ileChooserUI.java:414)
        at javax.swing.plaf.metal.MetalFileChooserUI.installComponents(MetalFile
ChooserUI.java:304)
        at javax.swing.plaf.basic.BasicFileChooserUI.installUI(BasicFileChooserU
I.java:130)
        at javax.swing.plaf.metal.MetalFileChooserUI.installUI(MetalFileChooserU
I.java:152)
        at javax.swing.JComponent.setUI(JComponent.java:449)
        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 Tracer.<init>(Tracer.java:40)
        at Main.init(Main.java:22)
        at sun.applet.AppletPanel.run(AppletPanel.java:353)
        at java.lang.Thread.run(Thread.java:534) 

any help would be great.
this project has gone on too long!
thanks
zzzzzzzzzzzzzzzzzzzzzzzzzzzzzz

[Ernest Friedman-Hill]

The standard answer is that unsigned applets can't access the local filesystem, while signed ones can request and be granted that permission. Have a look here for an idea of what you would need to do.