#2 NPE When Creating New Diagram

[Mark Fortner]

I get a Null Pointer Exception when creating a new
diagram. Here's the stack trace:

java.lang.NullPointerException
at java.util.Hashtable.get(Hashtable.java:329)
at
jdbcexplorer.dbtools.DbUtil.getConnection(DbUtil.java:124)
at
jdbcexplorer.swing.JFrameMain.openDiagram(JFrameMain.java:214)
at
jdbcexplorer.tree.NodeDiagram._open(NodeDiagram.java:124)
at
jdbcexplorer.tree.NodeDiagram.new_(NodeDiagram.java:80)
at
jdbcexplorer.tree.DbTree.actionPerformed(DbTree.java:94)
at
jdbcexplorer.swing.JActionSet.actionPerformed(JActionSet.java:99)
at
jdbcexplorer.swing.JActionSet$JAction.actionPerformed(JActionSet.java:172)
at
javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:1764)
at
javax.swing.AbstractButton$ForwardActionEvents.actionPerformed(AbstractButton.java:1817)
at
javax.swing.DefaultButtonModel.fireActionPerformed(DefaultButtonModel.java:419)
at
javax.swing.DefaultButtonModel.setPressed(DefaultButtonModel.java:257)
at
javax.swing.AbstractButton.doClick(AbstractButton.java:289)
at
javax.swing.plaf.basic.BasicMenuItemUI.doClick(BasicMenuItemUI.java:1113)
at
javax.swing.plaf.basic.BasicMenuItemUI$MouseInputHandler.mouseReleased(BasicMenuItemUI.java:943)
at
java.awt.AWTEventMulticaster.mouseReleased(AWTEventMulticaster.java:227)
at
java.awt.Component.processMouseEvent(Component.java:5134)
at
java.awt.Component.processEvent(Component.java:4931)
at
java.awt.Container.processEvent(Container.java:1566)
at
java.awt.Component.dispatchEventImpl(Component.java:3639)
at
java.awt.Container.dispatchEventImpl(Container.java:1623)
at
java.awt.Component.dispatchEvent(Component.java:3480)
at
java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:3450)
at
java.awt.LightweightDispatcher.processMouseEvent(Container.java:3165)
at
java.awt.LightweightDispatcher.dispatchEvent(Container.java:3095)
at
java.awt.Container.dispatchEventImpl(Container.java:1609)
at
java.awt.Window.dispatchEventImpl(Window.java:1590)
at
java.awt.Component.dispatchEvent(Component.java:3480)
at
java.awt.EventQueue.dispatchEvent(EventQueue.java:450)
at
java.awt.EventDispatchThread.pumpOneEventForHierarchy(EventDispatchThread.java:197)
at
java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:150)
at
java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:144)
at
java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:136)
at
java.awt.EventDispatchThread.run(EventDispatchThread.java:99)