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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