#1 coding error after file name rename

[Anonymous]

All folders renamed to lowercase (i.e. removal of silly JHelpMaker to jhelpmaker!).

Command terminal output below:

$ java -jar ./jhelpmaker.jar
Exception in thread "AWT-EventQueue-0" java.lang.NullPointerException
at sahaayam.source.action.HelpSys.showHelp(HelpSys.java:121)
at sahaayam.source.action.HelpSys.actionPerformed(HelpSys.java:66)
at javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:1879)
at javax.swing.AbstractButton$Handler.actionPerformed(AbstractButton.java:2199)
at javax.swing.DefaultButtonModel.fireActionPerformed(DefaultButtonModel.java:450)
at javax.swing.DefaultButtonModel.setPressed(DefaultButtonModel.java:288)
at javax.swing.AbstractButton.doClick(AbstractButton.java:332)
at javax.swing.plaf.basic.BasicMenuItemUI.doClick(BasicMenuItemUI.java:1030)
at javax.swing.plaf.basic.BasicMenuItemUI$Handler.mouseReleased(BasicMenuItemUI.java:1071)
at java.awt.Component.processMouseEvent(Component.java:5529)
at javax.swing.JComponent.processMouseEvent(JComponent.java:3148)
at java.awt.Component.processEvent(Component.java:5294)
at java.awt.Container.processEvent(Container.java:2001)
at java.awt.Component.dispatchEventImpl(Component.java:3996)
at java.awt.Container.dispatchEventImpl(Container.java:2059)
at java.awt.Component.dispatchEvent(Component.java:3844)
at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4249)
at java.awt.LightweightDispatcher.processMouseEvent(Container.java:3929) at java.awt.LightweightDispatcher.dispatchEvent(Container.java:3859)
at java.awt.Container.dispatchEventImpl(Container.java:2045)
at java.awt.Window.dispatchEventImpl(Window.java:1810)
at java.awt.Component.dispatchEvent(Component.java:3844)
at java.awt.EventQueue.dispatchEvent(EventQueue.java:545)
at java.awt.EventDispatchThread.pumpOneEventForHierarchy(EventDispatchThread.java:268)
at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:197)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:191) at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:183) at java.awt.EventDispatchThread.run(EventDispatchThread.java:144)