only one of the two should happen: either throw or calling Thread.interrupt()

org.netbeans.jemmy.operators.Operator.waitState(Waitable<R, Void>):
org.netbeans.jemmy.operators.JToolTipOperator.waitJToolTip(ComponentOperator, ComponentChooser):

 323 Thread.currentThread().interrupt();
 324 throw (new JemmyException("Waiting of " + waitable.getDescription()
 325 + " state has been interrupted!"));
only one of the two should happen: either throw or calling Thread.interrupt().
also there are extra unneeded brackets.