代码接收器的步骤

In this lesson, you will act as the receiver of the signed jar file containing the count.class file. It requests access to your system resources on your system that it normally would not have permission to access.

This procedure requires you to perform the following steps listed below.

1. 观察受限制的应用程序. This application will not be able to access your system resources until you import Susan's certificate and create a policy file.
2. Import Susan's certificate as a trusted certificateusing the keytool -import command, and give it the alias susan.
3. Set up a policy file to grant permissionfor the count application signed by susan to read the specified file on your system.
4. Test your reconfigured count applicationto verify that with a trusted certificate and access to your new policy file that grants it permission to read files on your system, count can now read your data file.