Results 1 to 6 of 6
  1. #1
    Sober's Avatar
    Sober is offline Member
    Join Date
    Sep 2010
    Posts
    1
    Rep Power
    0

    Default Exception in thread "AWT-EventQueue-0" java.lang.NullPointerException

    Help please?
    Java Code:
    Exception in thread "AWT-EventQueue-0" java.lang.NullPointerException
    	at pos2.sellJButtonActionPerformed(pos2.java:325)
    	at pos2.access$100(pos2.java:7)
    	at pos2$2.actionPerformed(pos2.java:158)
    	at javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:1995)
    	at javax.swing.AbstractButton$Handler.actionPerformed(AbstractButton.java:2318)
    	at javax.swing.DefaultButtonModel.fireActionPerformed(DefaultButtonModel.java:387)
    	at javax.swing.DefaultButtonModel.setPressed(DefaultButtonModel.java:242)
    	at javax.swing.plaf.basic.BasicButtonListener.mouseReleased(BasicButtonListener.java:236)
    	at java.awt.Component.processMouseEvent(Component.java:6267)
    	at javax.swing.JComponent.processMouseEvent(JComponent.java:3267)
    	at java.awt.Component.processEvent(Component.java:6032)
    	at java.awt.Container.processEvent(Container.java:2041)
    	at java.awt.Component.dispatchEventImpl(Component.java:4630)
    	at java.awt.Container.dispatchEventImpl(Container.java:2099)
    	at java.awt.Component.dispatchEvent(Component.java:4460)
    	at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4577)
    	at java.awt.LightweightDispatcher.processMouseEvent(Container.java:4238)
    	at java.awt.LightweightDispatcher.dispatchEvent(Container.java:4168)
    	at java.awt.Container.dispatchEventImpl(Container.java:2085)
    	at java.awt.Window.dispatchEventImpl(Window.java:2478)
    	at java.awt.Component.dispatchEvent(Component.java:4460)
    	at java.awt.EventQueue.dispatchEvent(EventQueue.java:599)
    	at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:269)
    	at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:184)
    	at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:174)
    	at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:169)
    	at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:161)
    	at java.awt.EventDispatchThread.run(EventDispatchThread.java:122)
    i am getting this error whenever i try to use an actionPerformed method that will set a text on a JTextArea. Thanks in advance. ;)

  2. #2
    al_Marshy_1981 is offline Senior Member
    Join Date
    Feb 2010
    Location
    Waterford, Ireland
    Posts
    748
    Rep Power
    5

    Default

    You need to post your code where the error takes place

  3. #3
    Norm's Avatar
    Norm is offline Moderator
    Join Date
    Jun 2008
    Location
    SW Missouri
    Posts
    17,449
    Rep Power
    25

    Default

    Exception in thread "AWT-EventQueue-0" java.lang.NullPointerException
    at pos2.sellJButtonActionPerformed(pos2.java:325)
    At line 325 in pos2 there is a variable that is null. Check that line and see what variable is null then back track to see why it doesn't have a value.

  4. #4
    al_Marshy_1981 is offline Senior Member
    Join Date
    Feb 2010
    Location
    Waterford, Ireland
    Posts
    748
    Rep Power
    5

    Default

    Im betting unassigned array someplace

  5. #5
    DarrylBurke's Avatar
    DarrylBurke is online now Member
    Join Date
    Sep 2008
    Location
    Madgaon, Goa, India
    Posts
    11,243
    Rep Power
    19

    Default

    Quote Originally Posted by al_Marshy_1981 View Post
    Im betting unassigned array someplace
    You're on :)

    I say it's the JTextArea, and the reason for it being null is a local variable shadowing a field.

    I'm curious... why an array?

    db

  6. #6
    al_Marshy_1981 is offline Senior Member
    Join Date
    Feb 2010
    Location
    Waterford, Ireland
    Posts
    748
    Rep Power
    5

    Default

    oh just beginners always seem to produce a null pointer on array's

Similar Threads

  1. Replies: 1
    Last Post: 08-20-2010, 10:42 AM
  2. Replies: 3
    Last Post: 04-30-2010, 07:44 PM
  3. Replies: 5
    Last Post: 08-26-2009, 11:37 AM
  4. Replies: 6
    Last Post: 08-03-2009, 08:58 PM
  5. Replies: 12
    Last Post: 10-05-2008, 06:52 AM

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •