Error Java Lang Nullpointerexception Fix
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Java.lang.nullpointerexception Error
ads with us Stack Overflow Questions Jobs Documentation Tags Users Badges Ask Question x Dismiss Join the Stack Overflow Community java.lang.nullpointerexception minecraft server Stack Overflow is a community of 4.7 million programmers, just like you, helping each other. Join them; it only takes a minute: Sign up How can I solve Exception in thread “main” java.lang.NullPointerException error
Java.lang.nullpointerexception Download
[duplicate] up vote 1 down vote favorite This question already has an answer here: What is a NullPointerException, and how do I fix it? 12 answers I am having a problem at a Java program. Exception in thread "main" java.lang.NullPointerException at twoten.TwoTenB.
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Java.lang.nullpointerexception Android
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How To Remove Null Pointer Exception In Java
Overflow Questions Jobs Documentation Tags Users Badges Ask Question x Dismiss Join the Stack Overflow Community Stack Overflow is a community of java.lang.nullpointerexception eclipse 4.7 million programmers, just like you, helping each other. Join them; it only takes a minute: Sign up What is a NullPointerException, and how do I fix it? up vote 211 down vote favorite 294 What http://stackoverflow.com/questions/19467202/how-can-i-solve-exception-in-thread-main-java-lang-nullpointerexception-error are Null Pointer Exceptions (java.lang.NullPointerException) and what causes them? What methods/tools can be used to determine the cause so that you stop the exception from causing the program to terminate prematurely? java nullpointerexception share edited May 26 at 16:15 TheLostMind♦ 28k64076 asked Oct 20 '08 at 13:18 Ziggy 7,374165374 locked by Robert Harvey♦ Aug 26 '14 at 23:04 This question's answers are a collaborative effort: if you see something that can be http://stackoverflow.com/questions/218384/what-is-a-nullpointerexception-and-how-do-i-fix-it improved, just edit the answer to improve it! No additional answers can be added here comments disabled on deleted / locked posts / reviews| 12 Answers 12 active oldest votes up vote 1326 down vote accepted When you declare a reference variable (i.e. an object) you are really creating a pointer to an object. Consider the following code where you declare a variable of primitive type int: int x; x = 10; In this example the variable x is an int and Java will initialize it to 0 for you. When you assign it to 10 in the second line your value 10 is written into the memory location pointed to by x. But, when you try to declare a reference type something different happens. Take the following code: Integer num; num = new Integer(10); The first line declares a variable named num, but, it does not contain a primitive value. Instead it contains a pointer (because the type is Integer which is a reference type). Since you did not say as yet what to point to Java sets it to null, meaning "I am pointing at nothing". In the second line, the new keyword is used to instantiate (or create) an object of type Integer and the pointer variable num is assigned this object.
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