1. NullPointerException when trying to set a jcheckbox stackoverflow.comTrying to set it so if a certain condition is met then one of two check-boxes will be checked. However I keep getting a nullpointerexception error. the code is.. |
2. null pointer exception when clicking on JCheckbox coderanch.comException in thread "AWT-EventQueue-2" java.lang.NullPointerException at javax.swing.plaf.basic.BasicTableHeaderUI$MouseInputHandler.mouseClicked(Unknown Source) at java.awt.AWTEventMulticaster.mouseClicked(Unknown Source) at java.awt.Component.processMouseEvent(Unknown Source) at javax.swing.JComponent.processMouseEvent(Unknown Source) at java.awt.Component.processEvent(Unknown Source) at java.awt.Container.processEvent(Unknown Source) at java.awt.Component.dispatchEventImpl(Unknown Source) at java.awt.Container.dispatchEventImpl(Unknown Source) at java.awt.Component.dispatchEvent(Unknown Source) at java.awt.LightweightDispatcher.retargetMouseEvent(Unknown Source) at java.awt.LightweightDispatcher.processMouseEvent(Unknown Source) at java.awt.LightweightDispatcher.dispatchEvent(Unknown Source) at java.awt.Container.dispatchEventImpl(Unknown Source) at java.awt.Component.dispatchEvent(Unknown Source) at java.awt.EventQueue.dispatchEvent(Unknown Source) at java.awt.EventDispatchThread.pumpOneEventForFilters(Unknown Source) at java.awt.EventDispatchThread.pumpEventsForFilter(Unknown Source) at java.awt.EventDispatchThread.pumpEventsForHierarchy(Unknown Source) at java.awt.EventDispatchThread.pumpEvents(Unknown ... |
3. Null Pointer Exception in an Array of JCheckBoxes java-forums.orgSo I have an array of 7 checkboxes with the names of consecutive days next to them. The program checks off the days how many consecutive days the program was run. I get a null pointer exception when i initialize the array of JCheckBoxes (in REd below). I'm noe sure how to fix it. Could use a little help and explanation ... |