No Such Field Error Java
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No Such Field Error Instance
Ask Question x Dismiss Join the Stack Overflow Community Stack Overflow is a community of 6.2 million programmers, just like you, helping each other. java.lang.nosuchfielderror minecraft Join them; it only takes a minute: Sign up NoSuchFieldError Java up vote 17 down vote favorite 4 I am getting a NoSuchFieldError in my code, now oracle isn't very clear about why this error is thrown only saying:
Java.lang.nosuchfielderror Enum
this error can only occur at run time if the definition of a class has incompatibly changed. Can someone explain to me how one could 'incompatibly change' a class? The class I am talking about extends quite allot of classes so I suspect it might have to do with that but I don't know where to start looking or what I'm looking for. java debugging share|improve this question asked Jul 13 '11 at 23:09 Tim 77331226 java.lang.nosuchfielderror hibernate It would probably help if you included a stack trace or just a hint at what you attempted to do. –biziclop Jul 13 '11 at 23:12 can you post some code? –timaschew Jul 13 '11 at 23:12 Well, I have a class calles LuaUserdata that represents a Lua Userdata value (you can forget about lua, its unrelated) this class has a field called m_metatable, LuaUserdata is extended by class 'a', 'a' extended by 'b' and eventually class 'e' by 'Part'. When I try to access the field m_metatable in 'Part' I get this error, which is odd since the field ins't accessed a single time in classes a,b,etc and all classes that extend 'd' can still access the field. –Tim Jul 13 '11 at 23:19 add a comment| 4 Answers 4 active oldest votes up vote 30 down vote accepted This error is typically thrown if you only partially recompile your code. You've got old code that is referencing a field that no longer exists in the recompiled class files. The solution is to clean out all the class files and compile everything from fresh. Update: If you still get the same error after recompiling everything, then you're probably compiling against one version of an external library and using another at runtime. What you need to do now is first identify the class that is causing the
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Java.lang.nosuchfielderror: Before_class
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Java Lang Nosuchfielderror Trace
about Stack Overflow the company Business Learn more about hiring developers or posting ads with us Stack _mingzipsize Overflow Questions Jobs Documentation Tags Users Badges Ask Question x Dismiss Join the Stack Overflow Community Stack Overflow is a community of 6.2 million programmers, just like you, http://stackoverflow.com/questions/6686753/nosuchfielderror-java helping each other. Join them; it only takes a minute: Sign up NoSuchFieldError but the field is there up vote 0 down vote favorite I just upgraded a library, and another one started throwing NoSuchFieldError. It would be fine, if the field was removed. But it stays. It's just deprecated. Hibernate.TIMESTAMP.nullSafeGet(null, null); // << works new PersistentDateTime().nullSafeGet(null, null); http://stackoverflow.com/questions/5586633/nosuchfielderror-but-the-field-is-there // << throws NoSuchFieldError where the the nullSafeGet method has: Hibernate.TIMESTAMP.nullSafeGet(resultSet, string); (of course, the field that is not found is TIMESTAMP) the correct version of the library is on the classpath (otherewise my manual test would not have worked as well) Why is that happening? Update: I made a new class, overriding the old one, and defining the same method, with the exactly same code, and it works now. Any idea what's supposed to be happening in the bytecode? java hibernate share|improve this question edited Apr 8 '11 at 8:55 asked Apr 7 '11 at 19:38 Bozho 385k82773946 add a comment| 2 Answers 2 active oldest votes up vote 2 down vote accepted Joshua Bloch explained this in his short presentation - static final fields are copied into the client library, so it should be recompiled when a constant changes. share|improve this answer answered Jul 29 '11 at 13:31 Bozho 385k82773946 Apologies for re-opening this discussion, but I'm curious - how would this result in a NoSuchFiel
the class,interface or enum".You may think if we try to access a unavailable field then at the compile-time itself you would be alerted of http://craftingjava.blogspot.com/2012/08/javalangnosuchfielderror_9430.html this error then how come this error is thrown at run-time. In https://dzone.com/articles/spring-and-0 most of the cases this error is thrown when we use third-party libraries in our application and i will explain you how in this post. This error is thrown because ofbinary incompatibility,which arises when we modify a class in such a way that the class is ended up in no such an inconsistent state. The main reason for this error to be thrown at run-time is "that you may have accidentally (indeed purposefully) deleted a field(public or protected) from the class, or interface andrecompiled the edited class or interface alone." As a result,pre-existing classes that has symbolic reference to this field will have no idea about the deletion of the field.So if you no such field execute the class without recompiling it then at the run-time only you will be shown this error message. Have a look at the following program to understand. Class C class C { static int c=20; } Class D class D extends C { public static void main(String args[]) { System.out.println(c); } } This program will run without showing any error. Now If i delete the fieldcfrom class C(static int c=20)and recompile it alone thenclass Dwould not be aware of the changes made in theclass C.This is the reason why java.lang.NoSuchFieldError is thrown when i execute theclass D. This error also applies toenumerated types,because if you delete the enum constant and if you try to access the constant without recompiling the class to be executed,you will get this error.See how Program: import java.util.*; public class Nosuch { public static void main(String[] args) { Level l=Level.LOW; System.out.println(l.toString()); } } enum Level { LOW,MEDIUM,HIGH; } If i delete the enum constant "LOW " from the enum declaration and recompile theLevel.javafile alone and execute theclass Nosuchthen you will get this error. Exception in thread "main"
Refcardz Guides Zones | Agile Big Data Cloud Database DevOps Integration IoT Java Mobile Performance Web Dev Let's be friends: Spring and the java.lang.NoSuchFieldError: NULL Exception by Roger Hughes · May. 21, 13 · Performance Zone Like (0) Comment (0) Save Tweet {{ articles[0].views | formatCount}} Views Edit Delete {{ articles[0].isLocked ? 'Enable' : 'Disable' }} comments {{ articles[0].isLimited ? 'Remove comment limits' : 'Enable moderated comments' }} Join the DZone community and get the full member experience. Join For Free Download Forrester’s “Vendor Landscape, Application Performance Management” report that examines the evolving role of APM as a key driver of customer satisfaction and business success, brought to you in partnership with BMC. A few days ago I was going through a project's Maven dependencies, removing unused junk, checking jar file version numbers adding a little dependency management and generally tidying up (yes, I know that this isn't something we often get time to do, but even Maven dependencies can be a form of technical debt). After recompiling and running the unit tests I ran some end to end tests only to find that the whole thing fell apart... Big time. The exception I got was the usual one that all Spring developers get, a java.lang.IllegalStateException: Failed to load ApplicationContext ...exception. This is nothing new and as a Spring developer you find the problem, which is usually a missing bean definition and move on. Only this time it was something different, and that's because the cause was: java.lang.NoSuchFieldError: NULL ...which gives you no clues about what's going wrong. Now I knew that I'd been messing around with the project's dependencies, so I must have broken something somewhere. It turned out that it was a transient dependency problem. I was using Spring Security version 3.1.1-RELEASE, which is built using version 3.0.7-RELEASE of the Spring core libraries and not as you'd expect version 3.1.1-RELEASE. This meant that I'd ended up with different and incompatible versions of some of the Spring libraries on my classpath. You may well wonder why the Guys at Spring Security build their code with version 3.0.7-RELEASE and they say that this is intentional and that it's to do with backwards compatibility issues. As Rob Winch, Spring Security Lead at SpringSource, says: "Spring Security uses 3.0.x (intentionally to support users that require it). For this reason, if you build with Maven and want to use Spring 3.1 you must either exclude the Spring dependencies in your maven pom, explicitly add the Spring 3.1 depend