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Avoiding this error

1 reply on 1 page. Most recent reply: Apr 21, 2003 11:43 PM by Rahul

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priti borse

Posts: 1
Nickname: prit308
Registered: Apr, 2003

Avoiding this error Posted: Apr 21, 2003 11:13 AM
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I am getting this error while running applet with a thread:
ava.security.AccessControlException: access denied (java.io.FilePermission \class.class read)
at java.security.AccessControlContext.checkPermission(AccessControlConte xt.java:270)
at java.security.AccessController.checkPermission(AccessController.java: 401)
at java.lang.SecurityManager.checkPermission(SecurityManager.java:542)
at java.lang.SecurityManager.checkRead(SecurityManager.java:887)
at java.io.File.isDirectory(File.java:698)
at sun.net.www.protocol.file.FileURLConnection.connect(FileURLConnection
.java:65)
at sun.net.www.protocol.file.FileURLConnection.initializeHeaders(FileURL
Connectio n.java:90)
at sun.net.www.protocol.file.FileURLConnection.getContentLength(FileURLC
onnection .java:136)
at sun.applet.AppletClassLoader.getBytes(AppletClassLoader.java:255)
at sun.applet.AppletClassLoader.access$100(AppletClassLoader.java:42)
at sun.applet.AppletClassLoader$1.run(AppletClassLoader.java:143)
at java.security.AccessController.doPrivileged(Native Method)
at sun.applet.AppletClassLoader.findClass(AppletClassLoader.java:140)
at java.lang.ClassLoader.loadClass(ClassLoader.java:299)
at sun.applet.AppletClassLoader.loadClass(AppletClassLoader.java:114)
at java.lang.ClassLoader.loadClass(ClassLoader.java:255)
at sun.applet.AppletClassLoader.loadCode(AppletClassLoader.java:506)
at sun.applet.AppletPanel.createApplet(AppletPanel.java:566)
at sun.applet.AppletPanel.runLoader(AppletPanel.java:495)
at sun.applet.AppletPanel.run(AppletPanel.java:292)
at java.lang.Thread.run(Thread.java:536)


Rahul

Posts: 52
Nickname: wildhorse
Registered: Oct, 2002

Re: Avoiding this error Posted: Apr 21, 2003 11:43 PM
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Applets generally do not have permission to read/write files on the local m/c unless approved by the security manager(for applets loaded from the network).

You can implement the SecurityManager class and override the checkRead() and checkWrite() methods for file access.

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