[Biojava-l] Help with Chromatogram applet

[gtg477y at mail.gatech.edu]

Hi all,

It seems I might not be the first person to ask about this, but I am working on
a chromatogram applet. I am trying to open chromatogram files using
ChromatogramFactory. I first tried it in a stand alone app, and it worked fine,
but when I try to use the ChromatogramFactory.create method in an applet, it
gives me the following message:

  Exception in thread "AWT-EventQueue-1" java.security.AccessControlException:
access denied (java.io.FilePermission 3422_A01.ab1 read)

  at
java.security.AccessControlContext.checkPermission(AccessControlContext.java:264)
  at java.security.AccessController.checkPermission(AccessController.java:427)
  at java.lang.SecurityManager.checkPermission(SecurityManager.java:532)
  at java.lang.SecurityManager.checkRead(SecurityManager.java:871)
  at java.io.FileInputStream.<init>(FileInputStream.java:100)
  at
org.biojava.bio.chromatogram.ChromatogramFactory.create(ChromatogramFactory.java:69)
  at ChromatogramApplet.paint(ChromatogramApplet.java:19)
  at sun.awt.RepaintArea.paintComponent(RepaintArea.java:248)
  at sun.awt.RepaintArea.paint(RepaintArea.java:224)
  at sun.awt.windows.WComponentPeer.handleEvent(WComponentPeer.java:254)
  at java.awt.Component.dispatchEventImpl(Component.java:4060)
  at java.awt.Container.dispatchEventImpl(Container.java:2024)
  at java.awt.Component.dispatchEvent(Component.java:3819)
  at java.awt.EventQueue.dispatchEvent(EventQueue.java:463)
  at
java.awt.EventDispatchThread.pumpOneEventForHierarchy(EventDispatchThread.java:242)
  at
java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:163)
  at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:157)
  at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:149)
  at java.awt.EventDispatchThread.run(EventDispatchThread.java:110)


I'm pretty new to Java, so I don't know what a lot of it means, but I assume
that for some reason I don't have permission to access the file from an applet.
Is that pretty much correct? Is there any way to get around this? Or should I
perhaps use a different class to open the files?

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