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java.lang.ClassCastException: java.lang.Character cannot be cast to	at	at	at	at javax.swing.plaf.synth.SynthSpinnerUI.update(	at javax.swing.JComponent.paintComponent(	at javax.swing.JComponent.paint(	at javax.swing.JComponent.paintChildren(	at javax.swing.JComponent.paint(	at javax.swing.JComponent.paintToOffscreen(	at javax.swing.BufferStrategyPaintManager.paint(	at javax.swing.RepaintManager.paint(	at javax.swing.JComponent._paintImmediately(	at javax.swing.JComponent.paintImmediately(	at javax.swing.RepaintManager.paintDirtyRegions(	at javax.swing.RepaintManager.paintDirtyRegions(	at javax.swing.RepaintManager.seqPaintDirtyRegions(	at javax.swing.SystemEventQueueUtilities$	at java.awt.event.InvocationEvent.dispatch(	at java.awt.EventQueue.dispatchEvent(	at java.awt.EventDispatchThread.pumpOneEventForFilters(	at java.awt.EventDispatchThread.pumpEventsForFilter(	at java.awt.EventDispatchThread.pumpEventsForHierarchy(	at java.awt.EventDispatchThread.pumpEvents(	at java.awt.EventDispatchThread.pumpEvents(	at