Java in a Nutshell, 5th Edition [Electronic resources]

This class stores an arbitrary collection of Permission objects. When Permission objects are added with the add( ) method, they are grouped into an internal set of PermissionCollection objects that contain only a single type of Permission. Use the elements( ) method to obtain an Enumeration of the Permission objects in the collection. Use implies( ) to determine if a specified Permission is implied by any of the Permission objects in the collection. Permissions is used by system code that manages security policies. Applications rarely need to use it.

public final class

Permissions extends PermissionCollection implements Serializable { // Public Constructors public

Permissions ( ); // Public Methods Overriding PermissionCollection public void

add (Permission

permission ); public java.util.Enumeration<Permission>

elements ( ); public boolean

implies (Permission

permission ); }