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 * A computation to be performed with privileges enabled.  The computation is
 * performed by invoking {@code AccessController.doPrivileged} on the
 * {@code PrivilegedAction} object.  This interface is used only for
 * computations that do not throw checked exceptions; computations that
 * throw checked exceptions must use {@code PrivilegedExceptionAction}
 * instead.
 * @since 1.2
 * @see AccessController
 * @see AccessController#doPrivileged(PrivilegedAction)
 * @see PrivilegedExceptionAction
public interface PrivilegedAction<T> {
     * Performs the computation.  This method will be called by
     * {@code AccessController.doPrivileged} after enabling privileges.
     * @return a class-dependent value that may represent the results of the
     *         computation. Each class that implements
     *         {@code PrivilegedAction}
     *         should document what (if anything) this value represents.
     * @see AccessController#doPrivileged(PrivilegedAction)
     * @see AccessController#doPrivileged(PrivilegedAction,
     *                                     AccessControlContext)
    T run();