java.lang.NullPointerException: This exception has no message.

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via Oracle Community by 807596, 1 year ago
This exception has no message.
java.lang.NullPointerException:
at undefined.AllLights.mouseUp(AllLights.java:78)
at javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:1849)
at javax.swing.AbstractButton$Handler.actionPerformed(AbstractButton.java:2167)
at javax.swing.DefaultButtonModel.fireActionPerformed(DefaultButtonModel.java:420)
at javax.swing.DefaultButtonModel.setPressed(DefaultButtonModel.java:258)
at javax.swing.plaf.basic.BasicButtonListener.mouseReleased(BasicButtonListener.java:234)
at java.awt.Component.processMouseEvent(Component.java:5465)
at javax.swing.JComponent.processMouseEvent(JComponent.java:3089)
at java.awt.Component.processEvent(Component.java:5230)
at java.awt.Container.processEvent(Container.java:1961)
at java.awt.Component.dispatchEventImpl(Component.java:3933)
at java.awt.Container.dispatchEventImpl(Container.java:2019)
at java.awt.Component.dispatchEvent(Component.java:3781)
at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4205)
at java.awt.LightweightDispatcher.processMouseEvent(Container.java:3885)
at java.awt.LightweightDispatcher.dispatchEvent(Container.java:3815)
at java.awt.Container.dispatchEventImpl(Container.java:2005)
at java.awt.Window.dispatchEventImpl(Window.java:1764)
at java.awt.Component.dispatchEvent(Component.java:3781)
at java.awt.EventQueue.dispatchEvent(EventQueue.java:463)
at java.awt.EventDispatchThread.pumpOneEventForHierarchy(EventDispatchThread.java:234)
at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:163)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:157)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:149)
at java.awt.EventDispatchThread.run(EventDispatchThread.java:110)

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