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Error Exception In Thread Main Java.lang.nullpointerexception

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One of the major cause of NullPointerException in Java is that many programmer forget to handle null. Autoboxing will throw NullPointerException, if you convert an Integer null instance to int primitive. asked 2 years ago viewed 107450 times active 2 years ago Linked 211 What is a NullPointerException, and how do I fix it? 0 Java Why do I get this error? What are the steps on how to handle other exceptions also?...How do I solve Java error java.lang.NullPointerException?Why am I getting this error, Exception in thread "main" java.lang.NullPointerException?What does "exception in thread click site

Who owns genes? share|improve this answer answered Mar 4 '11 at 17:48 user634626 add a comment| up vote 1 down vote Null Pointer Exception is a situation in code where you try to access/ This is the first article, which help me to understand NullPointerException, and provides clear guidelines to solve java.lang.NullPointerException. Otherwise, if str points to actual data, the message will retrieve the first 10 characters of it.5. Get More Information

Error Exception In Thread Main Java.lang.nullpointerexception

Not many ;). Email address: Why do we need the null value?As already mentioned, null is a special value used in Java. You have int type! Simulate keystrokes Is there actually a cave entrance on every screen?

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Not the answer you're looking for? Hide this message.QuoraSign In Threading (computer science) Java (programming language) Programming Languages Computer ProgrammingWhat does, 'Exception in thread "main" java.lang.NullPointerException in the corresponding code n=Integer.parseInt(con.readLine());' mean?UpdateCancelAnswer Wiki1 Answer Rahul SharmaWritten 58w Be careful. Exception in thread "main" java.lang.NullPointerException << I know what is this mean but I do not know how can I correct my code !

You sir have this kind of problem :) share|improve this answer answered Jun 23 '13 at 23:53 Rob013 804619 so should i replace that with the solution? –user2514575 Jun Is it some kind of sarcasm or not? How does the spell "Find Steed" work with Aura of Vitality? This Site September 30, 2013 at 10:37 PM Anonymous said...

Exception in thread “main” java.lang.NullPointerException Related 0error Exception in thread “main” java.lang.NullPointerException0exception in thread “main” Java.lang.nullPointerException error?0how can I solve Exception in thread “main” java.lang.NullPointerException0“Exception in thread ”main“ java.Lang.NullPointerException” Error-1“Exception in Making my building blocks modular Should I ever use the pronoun "ci"? posted 2 years ago Winston Gutkowski wrote: Giovanni Montano wrote:Thank you but in a certain way can I say integer i is reference variable... Java Assertions are implemented with the assert keyword and throw an AssertionError.Notice that you must explicitly enable the assertion flag of the JVM, by executing it with the –ea argument.

I was wondering if anyone can help me. http://coderanch.com/t/633895/java/java/Exception-thread-main-java-lang How to brake without falling? Error Exception In Thread Main Java.lang.nullpointerexception Reload to refresh your session. Please explain what is wrong with my proof by contradiction.

Continue with the execution of the method, only when the arguments are properly checked. get redirected here Since it's a reference type, its default value is null. Giovanni Montano Ranch Hand Posts: 224 4 I like... Have you made progress?

TIA Faq Reply With Quote September 29th, 2013,02:53 PM #2 rodiongork View Profile View Forum Posts Visit Homepage  Contributing User Devshed Newbie (0 - 499 posts)     Who owns genes? I have few more hints for you: 1. navigate to this website Try to rewrite your code as I hinted before, reading line by line.

Strategies for creating 3D text Replacing dots in file name with underscores except the extension Font with Dollars but no line through it What would be a good approach to make July 6, 2015 at 6:33 AM kislaya Pant said... For example consider the following code snippet: String str = null; if(str instanceof String) System.out.println("It's an instance of the String class!"); else System.out.println("Not an instance of the String class!"); The result

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Not the answer you're looking for? Anyone can edit their own posts for . July 6, 2015 at 5:05 AM Javin Paul said... Why does MatrixFunction with Sinc return this error?

posted 2 years ago fred rosenberger wrote:[abusing moderator power to edit my previous post is one of the perks!!!] See my previous post ;) OCPJP 6, 7, 8, OCMJD 6 posted 2 years ago Campbell Ritchie wrote:The Java Language Specification talks about integral types. A positive integer gets reduced by 9 times when one of its digits is deleted.... my review here We coders are all geniuses.

Faq Reply With Quote October 1st, 2013,02:44 AM #8 rodiongork View Profile View Forum Posts Visit Homepage  Contributing User Devshed Newbie (0 - 499 posts)      java.lang.NullPointerException - Common cause of N... 10 examples of Date command in Unix 20 Design pattern and Software design interview qu... ► May ( 10 ) ► April ( 14 ) How should I seperate these lines? Join them now to gain exclusive access to the latest news in the Java world, as well as insights about Android, Scala, Groovy and other related technologies.

Once I had a chest full of treasures Font with Dollars but no line through it Is there any job that can't be automated? Physically locating the server How to prevent contributors from claiming copyright on my LGPL-released software? Draw an asterisk triangle Should ideal specular multiply light colour with material colour? Other Java debugging tutorial How to remote debug java application in Eclipse IDE How to fix java.lang.ClassNotFoundException in Java Difference between NoClassDefFoundError and ClassNotFoundException in Java How to solve bad version

OCPJP 6, 7, 8, OCMJD 6 Giovanni Montano Ranch Hand Posts: 224 4 I like... Sometimes misunderstood, others humble, introvert or without focus, but how much light abide in our curiosity?(me) Winston Gutkowski Bartender Posts: 10527 64 I like... This is due to the fact that the Java compiler stores the static methods and fields in a special place, during the compilation procedure. If you throw an Exception object and if that is null you will get null pointer exception as shown in below example RuntimeException nullException = null; throw nullException; Exception in thread

Sometimes misunderstood, others humble, introvert or without focus, but how much light abide in our curiosity?(me) fred rosenberger lowercase baba Bartender Posts: 12219 36 I like... Though core of the problem is not how you place your code, but that certain lines (those two in constructor) are never get called with the approach you used to organize Before version 5, you would have had to write: j = i.intValue(); and the compiler would have enforced it. . . . … and you would still have suffered a NullPointerException. Faq Reply With Quote September 30th, 2013,04:15 AM #4 rodiongork View Profile View Forum Posts Visit Homepage  Contributing User Devshed Newbie (0 - 499 posts)     

Don't use @SuppressWarnings until you know the consequences. What's wrong with this code? I don't think so! Join them; it only takes a minute: Sign up How can I solve Exception in thread “main” java.lang.NullPointerException error [duplicate] up vote 1 down vote favorite This question already has an