Welcome to the Java Programming Forums


The professional, friendly Java community. 21,500 members and growing!


The Java Programming Forums are a community of Java programmers from all around the World. Our members have a wide range of skills and they all have one thing in common: A passion to learn and code Java. We invite beginner Java programmers right through to Java professionals to post here and share your knowledge. Become a part of the community, help others, expand your knowledge of Java and enjoy talking with like minded people. Registration is quick and best of all free. We look forward to meeting you.


>> REGISTER NOW TO START POSTING


Members have full access to the forums. Advertisements are removed for registered users.

Results 1 to 3 of 3

Thread: Exception in thread "AWT-EventQueue-0" java.lang.NullPointerException I CANT FIND THE MISTAKE

  1. #1
    Junior Member
    Join Date
    Nov 2012
    Posts
    1
    Thanks
    0
    Thanked 0 Times in 0 Posts

    Default Exception in thread "AWT-EventQueue-0" java.lang.NullPointerException I CANT FIND THE MISTAKE

    i am doing an insert program and it involve the exception handling
    when it catch the error a message dialog will be popped up and when i click ok i am getting following error
    and what is the problem?

    Exception in thread "AWT-EventQueue-0" java.lang.NullPointerException
    at AddNewStock$SaveAction.actionPerformed(AddNewStock .java:200)
    at javax.swing.AbstractButton.fireActionPerformed(Abs tractButton.java:2018)
    at javax.swing.AbstractButton$Handler.actionPerformed (AbstractButton.java:2341)
    at javax.swing.DefaultButtonModel.fireActionPerformed (DefaultButtonModel.java:402)
    at javax.swing.DefaultButtonModel.setPressed(DefaultB uttonModel.java:259)
    at javax.swing.plaf.basic.BasicButtonListener.mouseRe leased(BasicButtonListener.java:252)
    at java.awt.Component.processMouseEvent(Component.jav a:6504)
    at javax.swing.JComponent.processMouseEvent(JComponen t.java:3321)
    at java.awt.Component.processEvent(Component.java:626 9)
    at java.awt.Container.processEvent(Container.java:222 9)
    at java.awt.Component.dispatchEventImpl(Component.jav a:4860)
    at java.awt.Container.dispatchEventImpl(Container.jav a:2287)
    at java.awt.Component.dispatchEvent(Component.java:46 86)
    at java.awt.LightweightDispatcher.retargetMouseEvent( Container.java:4832)
    at java.awt.LightweightDispatcher.processMouseEvent(C ontainer.java:4492)
    at java.awt.LightweightDispatcher.dispatchEvent(Conta iner.java:4422)
    at java.awt.Container.dispatchEventImpl(Container.jav a:2273)
    at java.awt.Window.dispatchEventImpl(Window.java:2713 )
    at java.awt.Component.dispatchEvent(Component.java:46 86)
    at java.awt.EventQueue.dispatchEventImpl(EventQueue.j ava:707)
    at java.awt.EventQueue.access$000(EventQueue.java:101 )
    at java.awt.EventQueue$3.run(EventQueue.java:666)
    at java.awt.EventQueue$3.run(EventQueue.java:664)
    at java.security.AccessController.doPrivileged(Native Method)
    at java.security.ProtectionDomain$1.doIntersectionPri vilege(ProtectionDomain.java:76)
    at java.security.ProtectionDomain$1.doIntersectionPri vilege(ProtectionDomain.java:87)
    at java.awt.EventQueue$4.run(EventQueue.java:680)
    at java.awt.EventQueue$4.run(EventQueue.java:678)
    at java.security.AccessController.doPrivileged(Native Method)
    at java.security.ProtectionDomain$1.doIntersectionPri vilege(ProtectionDomain.java:76)
    at java.awt.EventQueue.dispatchEvent(EventQueue.java: 677)
    at java.awt.EventDispatchThread.pumpOneEventForFilter s(EventDispatchThread.java:211)
    at java.awt.EventDispatchThread.pumpEventsForFilter(E ventDispatchThread.java:128)
    at java.awt.EventDispatchThread.pumpEventsForHierarch y(EventDispatchThread.java:117)
    at java.awt.EventDispatchThread.pumpEvents(EventDispa tchThread.java:113)
    at java.awt.EventDispatchThread.pumpEvents(EventDispa tchThread.java:105)
    at java.awt.EventDispatchThread.run(EventDispatchThre ad.java:90)


  2. #2
    Super Moderator Norm's Avatar
    Join Date
    May 2010
    Location
    Eastern Florida
    Posts
    25,162
    Thanks
    65
    Thanked 2,725 Times in 2,675 Posts

    Default Re: Exception in thread "AWT-EventQueue-0" java.lang.NullPointerException I CANT FIND THE MISTAKE

    Exception in thread "AWT-EventQueue-0" java.lang.NullPointerException
    at AddNewStock$SaveAction.actionPerformed(AddNewStock .java:200)
    There is a variable on line 200 that has a null value when the line is executed. Look at that line and find the variable with the null value and then backtrack in the code to see why that variable does not have a valid non-null value.
    If you don't understand my answer, don't ignore it, ask a question.

  3. #3
    Super Moderator curmudgeon's Avatar
    Join Date
    Aug 2012
    Posts
    1,130
    My Mood
    Cynical
    Thanks
    64
    Thanked 140 Times in 135 Posts

    Default Re: Exception in thread "AWT-EventQueue-0" java.lang.NullPointerException I CANT FIND THE MISTAKE

    The problem is that you're trying to use a null variable at the line indicated by the error message above:
    AddNewStock .java:200

    i.e., line 200 of the AddNewStock class.

    Since you have the code and we don't, you'll have to check that line to see which variable is null on it, and then trace back in your code to see why.

Similar Threads

  1. Replies: 9
    Last Post: October 11th, 2012, 01:04 PM
  2. Replies: 2
    Last Post: August 30th, 2012, 09:45 AM
  3. Replies: 3
    Last Post: December 7th, 2011, 02:03 AM
  4. Replies: 7
    Last Post: August 13th, 2011, 01:22 AM
  5. Getting "AWT-EventQueue-0" java.lang.NullPointerException error
    By tryingtoJava in forum AWT / Java Swing
    Replies: 9
    Last Post: September 21st, 2009, 10:46 PM