473,503 Members | 338 Online
Bytes | Software Development & Data Engineering Community
+ Post

Home Posts Topics Members FAQ

NullPointerException when adding event to Jbutton - Netbeans

3 New Member
I am trying to edit the GUI of a project in Netbeans. In particular, I am trying to add new JButtons. I get a NullPointerException when I try to add an Event to any given JButton (even ones that already exist) in my application using the Design Editor.

I go about this by right-clicking on the JButton in the design editor, navigating to Events -> Action -> actionPerformed. The auto-generated code appears for a brief moment before it disappears and throws the NullPointerException. I am using NetBeans IDE 6.1 and JDK 6u7.

Below is the details of the exception. I am in dire need of a solution, but cannot find any solutions on the web, only old Bug tickets related to similar issues that have allegedly been fixed long ago. If anyone has some ideas, please assist me!

Expand|Select|Wrap|Line Numbers
  1. java.lang.NullPointerException
  2. at org.netbeans.modules.form.JavaCodeGenerator.getPro pertyCreator(JavaCodeGenerator.java:2263)
  3. at org.netbeans.modules.form.JavaCodeGenerator.genera tePropertyBeanSetterCode(JavaCodeGenerator.java:22 11)
  4. at org.netbeans.modules.form.JavaCodeGenerator.genera tePropertySetter(JavaCodeGenerator.java:2155)
  5. at org.netbeans.modules.form.JavaCodeGenerator.genera teProperty(JavaCodeGenerator.java:2081)
  6. at org.netbeans.modules.form.JavaCodeGenerator.genera teComponentProperties(JavaCodeGenerator.java:1603) 
  7. at org.netbeans.modules.form.JavaCodeGenerator.addIni tCode(JavaCodeGenerator.java:1171)
  8. at org.netbeans.modules.form.JavaCodeGenerator.addIni tCode(JavaCodeGenerator.java:1184)
  9. at org.netbeans.modules.form.JavaCodeGenerator.addIni tCode(JavaCodeGenerator.java:1184)
  10. at org.netbeans.modules.form.JavaCodeGenerator.addIni tCode(JavaCodeGenerator.java:1184)
  11. at org.netbeans.modules.form.JavaCodeGenerator.addIni tCode(JavaCodeGenerator.java:1184)
  12. at org.netbeans.modules.form.JavaCodeGenerator.addIni tCode(JavaCodeGenerator.java:1184)
  13. at org.netbeans.modules.form.JavaCodeGenerator.addIni tCode(JavaCodeGenerator.java:1184)
  14. at org.netbeans.modules.form.JavaCodeGenerator.addIni tCode(JavaCodeGenerator.java:1184)
  15. at org.netbeans.modules.form.JavaCodeGenerator.addIni tCode(JavaCodeGenerator.java:1184)
  16. at org.netbeans.modules.form.JavaCodeGenerator.addIni tCode(JavaCodeGenerator.java:1184)
  17. at org.netbeans.modules.form.JavaCodeGenerator.regene rateInitComponents(JavaCodeGenerator.java:1027)
  18. at org.netbeans.modules.form.JavaCodeGenerator.regene rateCode(JavaCodeGenerator.java:3418)
  19. at org.netbeans.modules.form.JavaCodeGenerator$FormLi stener.formChanged(JavaCodeGenerator.java:3887)
  20. at org.netbeans.modules.form.FormModel.fireEvents(For mModel.java:1268)
  21. at org.netbeans.modules.form.FormModel.fireEventBatch (FormModel.java:1241)
  22. at org.netbeans.modules.form.FormModel.firePendingEve nts(FormModel.java:1204)
  23. at org.netbeans.modules.form.FormModel.access$000(For mModel.java:62)
  24. [catch] at org.netbeans.modules.form.FormModel$2.run(FormMode l.java:1184)
  25. at java.awt.event.InvocationEvent.dispatch(Invocation Event.java:209)
  26. at java.awt.EventQueue.dispatchEvent(EventQueue.java: 597)
  27. at org.netbeans.core.TimableEventQueue.dispatchEvent( TimableEventQueue.java:104)
  28. at java.awt.EventDispatchThread.pumpOneEventForFilter s(EventDispatchThread.java:273)
  29. at java.awt.EventDispatchThread.pumpEventsForFilter(E ventDispatchThread.java:183)
  30. at java.awt.EventDispatchThread.pumpEventsForHierarch y(EventDispatchThread.java:173)
  31. at java.awt.EventDispatchThread.pumpEvents(EventDispa tchThread.java:168)
  32. at java.awt.EventDispatchThread.pumpEvents(EventDispa tchThread.java:160)
  33. at java.awt.EventDispatchThread.run(EventDispatchThre ad.java:121)
  34.  
Oct 6 '08 #1
1 3181
Stang02GT
1,208 Recognized Expert Top Contributor
This is a double post. Memeber has been notified about site policy, the other thread will be closed.




Moving to MISC.
Oct 6 '08 #2

Sign in to post your reply or Sign up for a free account.

Similar topics

2
3066
by: Smith | last post by:
The program compiled successfully, but it gives the following error on runtime.... java.lang.NullPointerException at FrogManiaApp.paint(FrogManiaApp.java:102) at...
0
2206
by: porky008 | last post by:
I need to add a search button to this and have no clue how to do it. Can some one please help me on this? import java.awt.*; import java.awt.event.*; import javax.swing.*; import...
17
1770
oll3i
by: oll3i | last post by:
nevermind the previous prob i posted i m getting further and i get a new exception in readFile method pleae help me with that one thank u a lot in advance java.lang.NullPointerException...
8
2044
nexcompac
by: nexcompac | last post by:
Ok, I am working on an inventory program and this is where I am at thus far. I seem to be getting two errors that I can not figure out. I will post the errors at the end of the code. import...
1
2401
by: ketand1 | last post by:
import java.awt.*; import java.awt.event.*; import java.io.*; import java.util.*; import java.sql.*; import java.lang.*; class DbAwt extends Frame implements ActionListener { private...
2
1675
by: KiranJyothi | last post by:
Hi All, I am trying to add buttons and I am not able to see them while running. Please let me know where I am going wrong. Thanks in advance. KiranJyothi <CODE> //KiranJyothi
2
2261
by: sokeefe | last post by:
I am trying to edit the GUI of a project in Netbeans. In particular, I am trying to add new JButtons. I get a NullPointerException when I try to add an Event to any given JButton (even ones that...
2
6855
by: dragonridingsorceress | last post by:
I am trying to learn how to use the JFileChooser. I'm working in BlueJ. I keep getting a NullPointerException. Full text of the error message is at the bottom of the post. My code is based on some...
1
6733
by: onlinegear | last post by:
HI i am writing this for college i know i have loads of combo boxes with nothing in the i havent got that far yet. but every time i run this is comes up with this erro run: Exception in thread...
0
7087
by: Hystou | last post by:
Most computers default to English, but sometimes we require a different language, especially when relocating. Forgot to request a specific language before your computer shipped? No problem! You can...
0
7334
jinu1996
by: jinu1996 | last post by:
In today's digital age, having a compelling online presence is paramount for businesses aiming to thrive in a competitive landscape. At the heart of this digital strategy lies an intricately woven...
1
6993
by: Hystou | last post by:
Overview: Windows 11 and 10 have less user interface control over operating system update behaviour than previous versions of Windows. In Windows 11 and 10, there is no way to turn off the Windows...
0
7462
tracyyun
by: tracyyun | last post by:
Dear forum friends, With the development of smart home technology, a variety of wireless communication protocols have appeared on the market, such as Zigbee, Z-Wave, Wi-Fi, Bluetooth, etc. Each...
0
5579
agi2029
by: agi2029 | last post by:
Let's talk about the concept of autonomous AI software engineers and no-code agents. These AIs are designed to manage the entire lifecycle of a software development project—planning, coding, testing,...
0
3168
by: TSSRALBI | last post by:
Hello I'm a network technician in training and I need your help. I am currently learning how to create and manage the different types of VPNs and I have a question about LAN-to-LAN VPNs. The...
0
1514
by: 6302768590 | last post by:
Hai team i want code for transfer the data from one system to another through IP address by using C# our system has to for every 5mins then we have to update the data what the data is updated ...
1
737
muto222
by: muto222 | last post by:
How can i add a mobile payment intergratation into php mysql website.
0
383
bsmnconsultancy
by: bsmnconsultancy | last post by:
In today's digital era, a well-designed website is crucial for businesses looking to succeed. Whether you're a small business owner or a large corporation in Toronto, having a strong online presence...

By using Bytes.com and it's services, you agree to our Privacy Policy and Terms of Use.

To disable or enable advertisements and analytics tracking please visit the manage ads & tracking page.