lordjack / crud-java-se-com-mysql Goto Github PK

Olá, eu tentei ver como funcionava seu CRUD porém ele apresenta o seguinte erro após ser importado e ter colocado a biblioteca de MySQL

Exception in thread "AWT-EventQueue-0" java.lang.NullPointerException
at modelo.ModelTable.getRowCount(ModelTable.java:33)
at javax.swing.JTable.getRowCount(JTable.java:2665)
at javax.swing.plaf.basic.BasicTableUI.createTableSize(BasicTableUI.java:1692)
at javax.swing.plaf.basic.BasicTableUI.getPreferredSize(BasicTableUI.java:1733)
at javax.swing.JComponent.getPreferredSize(JComponent.java:1662)
at javax.swing.ScrollPaneLayout.layoutContainer(ScrollPaneLayout.java:791)
at java.awt.Container.layout(Container.java:1513)
at java.awt.Container.doLayout(Container.java:1502)
at java.awt.Container.validateTree(Container.java:1698)
at java.awt.Container.validateTree(Container.java:1707)
at java.awt.Container.validateTree(Container.java:1707)
at java.awt.Container.validateTree(Container.java:1707)
at java.awt.Container.validateTree(Container.java:1707)
at java.awt.Container.validate(Container.java:1633)
at java.awt.Container.validateUnconditionally(Container.java:1670)
at java.awt.Window.show(Window.java:1033)
at java.awt.Component.show(Component.java:1671)
at java.awt.Component.setVisible(Component.java:1623)
at java.awt.Window.setVisible(Window.java:1014)
at gui.UsuarioGUI$11.run(UsuarioGUI.java:443)
at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:311)
at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:758)
at java.awt.EventQueue.access$500(EventQueue.java:97)
at java.awt.EventQueue$3.run(EventQueue.java:709)
at java.awt.EventQueue$3.run(EventQueue.java:703)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:74)
at java.awt.EventQueue.dispatchEvent(EventQueue.java:728)
at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:205)
at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:116)
at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:105)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:101)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:93)
at java.awt.EventDispatchThread.run(EventDispatchThread.java:82)
Você saberia me dizer o que eu devo fazer para corrigi-lo?