Using Permission and the Security Manager
		We need to use the SecurityManger to make use of these policy files. We can add System.setSecurityManager(new SecurityManager()) to the public static void main(String args[])  method of our executable class. Interestingly, this is also a case where a SecurityException can be thrown.  If a SecurityManager() is already installed, and the class is not permitted to add a new SecurityManager, then the exception is thrown.  This is the java.lang.RuntimePermission createSecurityManager permission. Alternatively, we can add another -D argument to our command line call to start the class.  Now our call may look like this: java -Djava.security.manager -Djava.security.policy=application.policy Application Note that we do not need to assign this to anything, just state it with the -D flag.  Making our Policy File