src/share/classes/javax/swing/SwingWorker.java

*** 818,828 ****
              Object doSubmit = appContext.get(DO_SUBMIT_KEY);
              if (doSubmit == null) {
                  doSubmit = new DoSubmitAccumulativeRunnable();
                  appContext.put(DO_SUBMIT_KEY, doSubmit);
              }
!             return (AccumulativeRunnable<Runnable>) doSubmit;
          }
      }
      private static class DoSubmitAccumulativeRunnable
            extends AccumulativeRunnable<Runnable> implements ActionListener {
          private final static int DELAY = 1000 / 30;
--- 818,830 ----
              Object doSubmit = appContext.get(DO_SUBMIT_KEY);
              if (doSubmit == null) {
                  doSubmit = new DoSubmitAccumulativeRunnable();
                  appContext.put(DO_SUBMIT_KEY, doSubmit);
              }
!             @SuppressWarnings("unchecked")
!             AccumulativeRunnable<Runnable> tmp = (AccumulativeRunnable<Runnable>) doSubmit;
!             return tmp;
          }
      }
      private static class DoSubmitAccumulativeRunnable
            extends AccumulativeRunnable<Runnable> implements ActionListener {
          private final static int DELAY = 1000 / 30;