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java.lang.NullPointerException: 	at java.util.Hashtable.get(Unknown Source)	at java.awt.Component.getFontMetrics(Unknown Source)	at javax.swing.text.WrappedPlainView.updateMetrics(Unknown Source)	at javax.swing.text.WrappedPlainView.setSize(Unknown Source)	at javax.swing.plaf.basic.BasicTextUI$RootView.setSize(Unknown Source)	at javax.swing.plaf.basic.BasicTextUI.modelToView(Unknown Source)	at javax.swing.text.DefaultCaret.repaintNewCaret(Unknown Source)	at javax.swing.text.DefaultCaret$1.run(Unknown Source)	at java.awt.event.InvocationEvent.dispatch(Unknown Source)	at java.awt.EventQueue.dispatchEvent(Unknown Source)	at java.awt.EventDispatchThread.pumpOneEventForHierarchy(Unknown Source)	at java.awt.EventDispatchThread.pumpEventsForHierarchy(Unknown Source)	at java.awt.EventDispatchThread.pumpEvents(Unknown Source)	at java.awt.EventDispatchThread.run(Unknown Source)