Cannot Be Referenced From A Static Context Java Error
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here for a quick overview of the site Help Center Detailed answers to any questions you might have Meta Discuss the workings and policies of this site About Us Learn more about Stack Overflow the company Business Learn more about hiring developers java non-static variable cannot be referenced from a static context or posting ads with us Stack Overflow Questions Jobs Documentation Tags Users Badges Ask Question x non static method cannot be referenced from a static context java error Dismiss Join the Stack Overflow Community Stack Overflow is a community of 4.7 million programmers, just like you, helping each other. Join them; it non static method cannot be referenced from a static context android only takes a minute: Sign up “Non-static method cannot be referenced from a static context” error [duplicate] up vote 44 down vote favorite 7 This question already has an answer here: Non-static variable cannot be referenced from a static context
Non-static Variable This Cannot Be Referenced From A Static Context New
10 answers I have a class named Media which has a method named setLoanItem: public void setLoanItem(String loan) { this.onloan = loan; } I am trying to call this method from a class named GUI in the following way: public void loanItem() { Media.setLoanItem("Yes"); } But I am getting the error non-static method setLoanItem(java.lang.String) cannot be referenced from a static context I am simply trying to change the variable onloan in the Media class to "Yes" from the GUI class. I non static field cannot be referenced from a static context android have looked at other topics with the same error message but nothing is clicking! java static compiler-errors share|improve this question edited May 6 '12 at 3:39 WATTO Studios 7,216103045 asked Feb 7 '11 at 14:02 Daniel Mckay 227133 marked as duplicate by BalusCjava Users with the java badge can single-handedly close java questions as duplicates and reopen them as needed. Apr 4 at 20:13 This question has been asked before and already has an answer. If those answers do not fully address your question, please ask a new question. you should accept an answer for this. –NateW Sep 26 '15 at 18:13 add a comment| 4 Answers 4 active oldest votes up vote 52 down vote Instance methods need to be called from an instance. Your setLoanItem method is an instance method (it doesn't have the modifier static), which it needs to be in order to function (because it is setting a value on the instance that it's called on (this)). You need to create an instance of the class before you can call the method on it: Media media = new Media(); media.setLoanItem("Yes"); (Btw it would be better to use a boolean instead of a string containing "Yes".) share|improve this answer edited May 14 '14 at 20:32 answered Feb 7 '11 at 14:06 Nathan Hughes 55k1390143 I get a null pointer exception when I do this though...What do you think the problem is?
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How To Access Non Static Variable In Static Method Java
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Non Static Variable Cannot Be Referenced From A Static Context Netbeans
Community 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 non-static variable this cannot be referenced from a http://stackoverflow.com/questions/4922145/non-static-method-cannot-be-referenced-from-a-static-context-error static context [duplicate] up vote 16 down vote favorite 2 This question already has an answer here: Non-static variable cannot be referenced from a static context 10 answers I'm new to Java from Ruby background, I made a simple code to test the class and object of Java public class ShowBike { private class Bicycle { public int gear = 0; public Bicycle(int v) { gear = v; http://stackoverflow.com/questions/15331846/non-static-variable-this-cannot-be-referenced-from-a-static-context } } public static void main() { Bicycle bike = new Bicycle(5); System.out.println(bike.gear); } } it gives me an error in the compiling process: ShowBike.java:12: non-static variable this cannot be referenced from a static context Bicycle bike = new Bicycle(5); ^ 1 error any idea? update after reading all the helpful answer here, I feel the static nested class behave the same as a class in a different file in the same package test/Bicycle.java package test; public class Bicycle { public static int wheels = 2; public int gear = 0; public Bicycle(int v) { gear = v; } } test/Launcher.java package test; public class Launcher { public static void main(String[] args) { Bicycle bike = new Bicycle(5); System.out.println(bike.gear); System.out.println(Bicycle.wheels); System.out.println(bike.wheels); } } Am I correct on this point? java oop nested-class share|improve this question edited Mar 11 '13 at 6:22 asked Mar 11 '13 at 5:36 mko 5,9382783138 marked as duplicate by EJP, guerda, Perception, akond, DarkAjax Mar 11 '13 at 18:49 This question has been asked before and already has an answer. If those answers do not fully address your question, please ask a new question. add a comment| 5 Answers 5 active oldest votes up vote
here for a quick overview of the site Help Center Detailed answers to any questions you might have Meta Discuss the workings and policies of this site About Us Learn http://stackoverflow.com/questions/13373779/non-static-class-cannot-be-referenced-from-a-static-context more about Stack Overflow the company Business Learn more about hiring developers or posting ads with us Stack Overflow Questions Jobs Documentation Tags Users Badges Ask Question x Dismiss Join the Stack Overflow Community https://www.quora.com/How-do-you-resolve-the-Java-error-Non-static-method-cannot-be-referenced-from-a-static-context 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 non-static class cannot be referenced from a static context [duplicate] cannot be up vote 15 down vote favorite 1 Possible Duplicate: Why do I get “non-static variable this cannot be referenced from a static context”? Here are the codes public class Stack { private class Node{ ... } ... public static void main(String[] args){ Node node = new Node(); // generates a compiling error } } the error says: non-static class Node cannot be referenced from a static context Why shouldn't cannot be referenced I refer the Node class in my main() method ? java inner-classes share|improve this question edited Aug 13 '15 at 15:40 R O M A N I A 12.2k116575 asked Nov 14 '12 at 5:59 Bin 193314 marked as duplicate by assylias, Kai, Starx, Nik Reiman, Iznogood Nov 14 '12 at 14:59 This question has been asked before and already has an answer. If those answers do not fully address your question, please ask a new question. "Node" should not be an inner class of "Stack". IMHO... –paulsm4 Nov 14 '12 at 6:06 @paulsm4 why not? –anthropomorphic Oct 10 '13 at 0:31 add a comment| 6 Answers 6 active oldest votes up vote 29 down vote accepted A non-static nested class in Java contains an implicit reference to an instance of the parent class. Thus to instantiate a Node, you would need to also have an instance of Stack. In a static context (the main method), there is no instance of Stack to refer to. Thus the compiler indicates it can not construct a Node. If you make Node a static class (or regular outer class), then it will not need a reference to Stack and can be instantia
you resolve the Java error "Non-static method cannot be referenced from a static context"?UpdateCancelAnswer Wiki4 Answers Satnam Singh, I have decades of functional programming experience esp. in Haskell.Written 38w agoHere is an example of the situation you describe:public class Points { int x; int y; public static void zeroPoint() { setPoint(0, 0); } public void setPoint (int xpos, int ypos) { x = xpos; y = ypos; } } This will result in a compile time error because it does not make sense for zeroPoint to contain a call to setPoint. The zeroPoint static method does not know which point is to be set.Classes contain two kinds of methods: static methods and instance methods. The static methods can not call the instance methods directly. Instance methods effectively have an additional implicit parameter that is a reference to an object that is an instance of the class (that is what this corresponds to). Static methods don't: they are much more like regular functions or procedures in non-OO languages. If you find yourself calling an instance method from a static method (in the same class or elsewhere) then something has gone wrong with the structure of your code. The static method has no idea what object the instance method is being applied to. Of course, you could inside a static method create an instance of a class, or pass one in through parameters, and then make calls on that object. But I sense that is not what is going on here.3.7k Views · View UpvotesRelated QuestionsMore Answers BelowWhy can't a non-static method be referenced from a static context?In Java, a static method can only call other static methods. Now as we know main() is a static method, so how it can call non-static method?Is a constructor is static or non-static? How can a static main method allows constructors to create objects?Java (programming language): Why can't a static method (directly) access non-static members?When should I use static classes or methods (java/c#)? Bruno Sofiato, Using Java professionally since 2002Written 38w agoThis error means that you've tried to call a non-s