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private static class CalendarAccessControlContext {
  private static final AccessControlContext INSTANCE;
    static {
      RuntimePermission perm = new RuntimePermission("accessClassInPackage.sun.util.calendar");
      PermissionCollection perms = perm.newPermissionCollection();
      perms.add(perm);
      INSTANCE = new AccessControlContext(new ProtectionDomain[] {
        new ProtectionDomain(null, perms)
      });
    }
  }

// ...
try {
zi = AccessController.doPrivileged(
       new PrivilegedExceptionAction<ZoneInfo>() {
         public ZoneInfo run() throws Exception {
           return (ZoneInfo) input.readObject();
         }
       }, CalendarAccessControlContext.INSTANCE);
} catch (PrivilegedActionException pae) { /* ... */ }
} catch (Exception e) { }
if (zi != null) {
  zone = zi;
}