December 1999
Intermediate to advanced
816 pages
20h 27m
English
Content preview from PURE Java™ 2Become an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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Creating Custom Permissions
You have seen how to create a policy file that uses predefined permissions. It may be the case, however, that your application needs to define its own permissions. This is easy to do in Java.
User-Defined Permission Code Example
You can check to see if a specific permission has been granted to your code by creating a Permission object of that type, such as a FilePermission object. Then you can check for that permission using the checkPermission() method of the AccessController class. This method does not return a value. If you have the permission, the method simply completes. If you do not have the permission, or if the values specified in the permission object that is the parameter to the checkPermission method are ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.