SecurityManager « Security « Java Tutorial

36.41.1.extends SecurityManager
36.41.2.Use SecurityManager to check AWT permission and file permission
36.41.3.Listing All Permissions Granted to Classes Loaded from a URL or Directory
36.41.4.Define your own security manager
36.41.5.Enabling the Security Manager
36.41.6.To specify an additional policy file, set the system property at the command line:
36.41.7.To ignore the policies in the file, and use the specified policy, use '==' instead of '='