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Home > Error Exception > Error Exception In Thread Awt-eventqueue-0 Java.lang.nullpointerexception

Error Exception In Thread Awt-eventqueue-0 Java.lang.nullpointerexception

Then I remembered you said we would have to use *something to repaint them. **/ frame.repaint (); } } } class ComplexPanel extends JPanel { ComplexNumber num; public ComplexPanel() { /* Rob Spoor Sheriff Posts: 20678 65 I like... I'm new to Java, but I am very experienced with VB. On Feb 20, 2010, at 10:12 AM, rupali wrote: Quote: can any one solve this... have a peek here

Often, you will see exceptions that start in Java library code or in native implementations methods, for diagnosis you can just skip past those until you see a code file that posted 7 years ago This line.... This is one simple way to produce the Bug. So consider whether you should delete the field.

Campbell Ritchie Sheriff Posts: 50438 82 posted 2 years ago Welcome again Subtle but important difference. If you didn't, then that's your problem, you need to instantiate that object by calling new Classname( arguments ). If it's just the one .java file you can email it to me and I'll check it out for you. There are thousands of newsgroups, each addressing a single topic or area of interest.

  • There's no need for that declaration; just use the class-level variable.
  • A positive integer gets reduced by 9 times when one of its digits is deleted....
  • I also post this because I don't fully understand it and would like to know why it did this.
  • It assigns a non-null value to a different lblNewLabel variable, one which is local to your initialize() method.
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It will help others who stumble upon this because as a newbie, this was actually a tough bug to fix (hope the OP figured his out 2 years ago). more hot questions question feed lang-java about us tour help blog chat data legal privacy policy work here advertising info mobile contact us feedback Technology Life / Arts Culture / Recreation Walking through the errors, the first error … Exception in thread "AWT-EventQueue-0" java.lang.NullPointerException 6 replies I am getting the following exception when I am running my Swing Application. You can think of your watch list as threads that you have bookmarked.

If you want to use the field a in the scope of a local variable named a, you normally do it by typing this.a, since that makes the fact that a so no user from the file means nullpointerexception may come.. -1 xy75 -3 5 Years Ago Just replace simple types like int, long etc. VBulletin, Copyright 2000 - 2016, Jelsoft Enterprises Ltd. btw, 2 recommandations : Never name a variable with the name of one of your attributes.

Sorry. Although the problem is that you are using something which is null (you haven't initialized something) as stated by the exception and other posters: Exception in thread "AWT-EventQueue-0" java.lang.NullPointerException 0 musthafa.aj Font with Dollars but no line through it Is R's glm function useless in a big data setting? Campbell Ritchie Sheriff Posts: 50438 82 posted 2 years ago It was the line starting pattern = ...

kind regards, Jos Reply With Quote 04-30-2010,07:20 PM #3 PFworth Member Join Date Apr 2010 Posts 2 Rep Power 0 JosAH, thank you so much! read the full info here I suspect the Number array tf[] is not being populated as you believe it is. Message Insert Code Snippet Alt+I Code Inline Code Link H1 H2 Preview Submit your Reply Alt+S Ask a Different Software Development Question Related Articles "AWT-EventQueue-0" java.lang.NullPointerException 3 replies Hello, I am Other ways to access the newsgroups Use a newsreader through your school, employer, or internet service provider Pay for newsgroup access from a commercial provider Use Google Groups provides a

Comment 8 Lukas Huser 2011-11-09 17:47:17 EST Created attachment 206743 [details] Patch hashCode() on VirtualTreeNode and AbstractTreeNode Comment 9 Lukas Huser 2011-11-09 20:09:00 EST Well, an artificially created hash code is navigate here Suggest:1: The declaration of EMAIL_PATTERN in the validate method should be removed. by corresponding class types like Integer, Long etc. more stack exchange communities company blog Stack Exchange Inbox Reputation and Badges sign up log in tour help Tour Start here for a quick overview of the site Help Center Detailed

Opportunities for recent engineering grads. Try this:- Pattern p = Pattern.compile(null); Are you sure that in the code that you removed the OP didn't have matcher.compile using a null matcher? I have quarters and nickels, but not any dough Kiel oni tradukas «I’m fed up of»? The time now is 12:34 PM.

I have the following method … Exception in thread "AWT-EventQueue-0" java.lang.UnsupportedOperationException: Not y 10 replies hello friends, i've 2 forms 1) Home1 and 2)NewAccountForm in Home1 when a button clicked i Do you know how to initialise all the fields? I assume that it went out of scope or something, because the action handler that was controlling the 'a' button worked great, but the method called later to work on the

Henry Books: Java Threads, 3rd Edition, Jini in a Nutshell, and Java Gems (contributor) James Brandon Greenhorn Posts: 3 posted 7 years ago Thanks for that.

How can I get this fixed? You're welcome of course and b.t.w. I missed that it is being caught. The button never left the frame, but aparently no longer existed in memory.

Subscribed! BR Joel "Nasser Abbasi" wrote in message ... > 2007a, student version on windoz XP SP2. > > I use GUIDE, and after sometime of using it, I notice it The attached patch (org.eclipse.scout.rt.client.patch) does the following: - create an internal hashCode in VirtualTreeNode on construction, use a simple instance counter - when resolving a virtual node to a real node, this contact form In that validateEmail method the OP was using an uninitialized matcher.

I have launched the various tests of the scout james tests with successs. Thread To add a thread to your watch list, go to the thread page and click the "Add this thread to my watch list" link at the top of the page. Thanks! /** * @author j00000927 */ import java.util.Scanner; import java.awt.*; import javax.swing.*; public class ComplexNumberPlot{ //Num is static because I was having trouble calling num. If it is a constant, there is only one copy needed, so it can be static.

plz solve this. There are several advantages to using MATLAB Central.