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java.lang.NullPointerException: 	at NewJFrame.updateJLabel(NewJFrame.java:317)	at NewJFrame.jXDatePicker1ActionPerformed(NewJFrame.java:370)	at NewJFrame.access$100(NewJFrame.java:23)	at NewJFrame$2.actionPerformed(NewJFrame.java:127)	at org.jdesktop.swingx.JXDatePicker.fireActionPerformed(JXDatePicker.java:911)	at org.jdesktop.swingx.JXDatePicker.commitEdit(JXDatePicker.java:740)	at org.jdesktop.swingx.plaf.basic.BasicDatePickerUI.commit(BasicDatePickerUI.java:914)	at org.jdesktop.swingx.plaf.basic.BasicDatePickerUI$Handler.monthViewActionPerformed(BasicDatePickerUI.java:1504)	at org.jdesktop.swingx.plaf.basic.BasicDatePickerUI$Handler.actionPerformed(BasicDatePickerUI.java:1479)	at org.jdesktop.swingx.JXMonthView.fireActionPerformed(JXMonthView.java:1845)	at org.jdesktop.swingx.JXMonthView.commitSelection(JXMonthView.java:1732)	at org.jdesktop.swingx.plaf.basic.BasicMonthViewUI$Handler.mouseReleased(BasicMonthViewUI.java:1753)	at java.awt.Component.processMouseEvent(Component.java:6505)	at javax.swing.JComponent.processMouseEvent(JComponent.java:3320)	at java.awt.Component.processEvent(Component.java:6270)	at java.awt.Container.processEvent(Container.java:2229)	at java.awt.Component.dispatchEventImpl(Component.java:4861)	at java.awt.Container.dispatchEventImpl(Container.java:2287)	at java.awt.Component.dispatchEvent(Component.java:4687)	at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4832)	at java.awt.LightweightDispatcher.processMouseEvent(Container.java:4492)	at java.awt.LightweightDispatcher.dispatchEvent(Container.java:4422)	at java.awt.Container.dispatchEventImpl(Container.java:2273)	at java.awt.Window.dispatchEventImpl(Window.java:2719)	at java.awt.Component.dispatchEvent(Component.java:4687)	at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:735)	at java.awt.EventQueue.access$200(EventQueue.java:103)	at java.awt.EventQueue$3.run(EventQueue.java:694)	at java.awt.EventQueue$3.run(EventQueue.java:692)	at java.security.AccessController.doPrivileged(Native Method)	at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:76)	at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:87)	at java.awt.EventQueue$4.run(EventQueue.java:708)	at java.awt.EventQueue$4.run(EventQueue.java:706)	at java.security.AccessController.doPrivileged(Native Method)	at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:76)	at java.awt.EventQueue.dispatchEvent(EventQueue.java:705)	at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:242)	at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:161)	at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:150)	at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:146)	at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:138)	at java.awt.EventDispatchThread.run(EventDispatchThread.java:91)