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26 package java.security;
30 * A computation to be performed with privileges enabled. The computation is
31 * performed by invoking <code>AccessController.doPrivileged</code> on the
32 * <code>PrivilegedAction</code> object. This interface is used only for
33 * computations that do not throw checked exceptions; computations that
34 * throw checked exceptions must use <code>PrivilegedExceptionAction</code>
37 * @see AccessController
38 * @see AccessController#doPrivileged(PrivilegedAction)
39 * @see PrivilegedExceptionAction
42 public interface PrivilegedAction<T> {
44 * Performs the computation. This method will be called by
45 * <code>AccessController.doPrivileged</code> after enabling privileges.
47 * @return a class-dependent value that may represent the results of the
48 * computation. Each class that implements
49 * <code>PrivilegedAction</code>
50 * should document what (if anything) this value represents.
51 * @see AccessController#doPrivileged(PrivilegedAction)
52 * @see AccessController#doPrivileged(PrivilegedAction,
53 * AccessControlContext)