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Java Cannot Reference A Field Before It Is Defined

Thanks Don't get me started about those stupid light bulbs. Can Trump undo the UN climate change agreement? How to decline a postdoc interview if there is some possible future collaboration? Note that cheat() will return false in the static initializer block because test has not been initialised yet. check my blog

It is a compile-time error if any of the four requirements above are not met. Later though, inside the lambda you can access test (via this). If those answers do not fully address your question, please ask a new question. 1 The problem is not specific to lambdas, an instance initializer will have the same problem. share|improve this answer answered Sep 11 '13 at 11:03 Joachim Sauer 186k35396504 compiler must check if is assigned exactly once, but definitely hasn't checked if it isn't referenced before http://stackoverflow.com/questions/22198527/cannot-reference-a-field-before-it-is-defined-error

Eclipse however complains on line 13 with "Cannot Reference a field before it is defined": SimpleEnumElement2(FailingEnum.dummyField); Comment 1 Kay Huber 2009-02-27 10:45:12 EST Created attachment 127008 [details] Test project with example Why is (a % 256) different than (a & 0xFF)? public enum Baz{ yin(yang), //Cannot reference a field before it is defined yang(yin), good(evil), //Cannot reference a field before it is defined evil(good); public final Baz opposite; Baz(Baz opposite){ this.opposite =

Close "Cannot reference a field before it is defined" Genuitec :: Driving Development for Leading Organizations › Forums › Archived Forums › MyEclipse Archived › Bugs This topic contains 3 replies, June 22, 2009 at 6:13 pm #299739 Reply przemelekMember Base on answer which I got on Twitter, it isn't problem caused by MyEclipse, but by Eclipse 3.4.2 https://bugs.eclipse.org/bugs/show_bug.cgi?id=269388 And in "bundled" Success! you cant use a variable before it is declared and thats why it wont compile...

River Crossing Puzzle Complement of CFL is Recursive Example for a commutative subring of a non-commutative ring How to prove that authentication system works, and that customer uses the wrong password? share|improve this answer answered Jan 29 '13 at 16:54 assylias 178k26340491 +1. share|improve this answer edited Sep 11 '13 at 11:57 answered Sep 11 '13 at 10:56 mikołak 7,25812753 right, it would be before initialization in: { final Integer i; final http://stackoverflow.com/questions/12592286/java-enum-cannot-reference-a-field-before-it-is-defined Good idea to use the names :) –Brian Sep 25 '12 at 23:08 add a comment| Did you find this question interesting?

Find the Emirps! At what stage a variable gets defined ? an assignment), unless they are qualified (in your case this.test). (paraphrased to suit this question more closely) share|improve this answer edited Jun 20 '15 at 22:40 answered Jun 20 '15 at When you call cheat() you go around that rule.

Try making your static variable final.In that case,you will be getting true.This is because your compiler itself will embed the value in bytecode(since the field is final) as part of optimisation this page public final class MyStaticClass { private static final A a; private static final B b; private MyStaticClass() {} static { a = new A(); b = new B(a); // Cannot access What is a satisfactory result of penetration testing assessment? Is there a word for being sad about knowing that the things that make you happy will eventually go away Lab colleague uses cracked software.

By the time b is being initialized, a should already have been. click site Cheers, Wim ashwin bhawsar Ranch Hand Posts: 62 I like... In your (failing) example, the "simple name" case is the condition not met. Can a text in Latin be understood by an educated Italian who never had any formal teaching of that language?

Would we find alien music meaningful? USA 2016 election demographic data Teenage daughter refusing to go to school Are “la malplej juna” and “la plej maljuna” entirely interchangeable? I guess I was confused with how C++ does it which gives you control on whether this or test would be captured (by value, etc.). –Christopher Oezbek Jun 20 '15 at http://bestimageweb.com/java-cannot/java-cannot-reference-before-supertype.php java static initialization inner-classes share|improve this question edited Aug 24 at 10:48 Mario Cervera 6291416 asked Sep 11 '13 at 10:48 user2622016 2,3231636 add a comment| 6 Answers 6 active oldest

Hot Network Questions Color substitution in a BufferedImage How much time would it take for a planet scale Miller-Urey experiment to generate intelligent life How do I make an alien technology I learn something new every day. 🙂 Author Posts Viewing 4 posts - 1 through 4 (of 4 total) Reply To: "Cannot reference a field before it is defined" Notify me Since the class definition is only loaded ('loaded' as in 'ClassLoader') at this point and nothing is yet being evaluated, no error occurs.

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How can I take a powerful plot item away from players without frustrating them? With cheat() you're actually reading an uninitialized value. 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 Check if an item is in a nested list Polyglot Anagrams Cops' Thread more hot questions question feed lang-java about us tour help blog chat data legal privacy policy work here

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 Skyrim: How to stop NPCs from picking up dropped items Polyglot Anagrams Robbers' Thread Does the electoral vote count ever get reallocated between states? current community chat Stack Overflow Meta Stack Overflow your communities Sign up or log in to customize your list. http://bestimageweb.com/java-cannot/java-cannot-reference-this-before-supertype.php share|improve this answer answered Sep 25 '12 at 23:20 meriton 42k1053121 I had not heard of deferred initialization, this seems like a good solution, but jcern's String version seems

Post Reply Bookmark Topic Watch Topic New Topic Similar Threads Compile time constants Question on static initializers.. share|improve this answer answered Aug 22 '13 at 13:58 Jelle Fresen 1,05311220 add a comment| Your Answer draft saved draft discarded Sign up or log in Sign up using Google Capturing test is not (it is not yet defined). Also another question mentions that fields are initialized before the initializer is called.

This is not a loophole, but rather it is not accessing test during initialization at all. –Christopher Oezbek Jun 20 '15 at 22:40 @ChristopherOezbek the qualified reference works specifically Explained another way: The use of fields inside an initialization block before the line on which they are declared can only be on the left hand side of an expression (i.e. What do I do? In particular: The declaration of a member needs to appear textually before it is used [...] if the usage occurs in a [...] static initializer of C.

I've looked around a few of the posts on this topic, and have seen the order that initialisation runs, but this doesn't seem to violate the rule. for (int i = 0; i < Baz.values().length; i += 2) { opposites.put(Baz.values()[i], Baz.values()[i + 1]); } } public Baz getOpposite() { return opposites.get(this); } } share|improve this answer edited Sep share|improve this answer answered Sep 25 '12 at 23:28 Natix 7,24163155 add a comment| up vote 0 down vote And then there is the totally OTT solution. How can an advanced (circa 7000 AD) spacefaring human civilization be prevented from entering its own solar system?

Updated now with a working version. –Pool May 7 '15 at 21:19 ... I am seen in darkness and in light, What am I? What is this line of counties voting for the Democratic party in the 2016 elections? How do I make an alien technology feel alien?

What does a -4 above the stave mean? What happens when a wizard tries to cast a cone of cold through a wall of fire? That means that in your code, you first set a to 20 and then initialize it to getA() - which is just as illegal as if you would have done it Example for a commutative subring of a non-commutative ring Skyrim: How to stop NPCs from picking up dropped items Non-Repetitive Quine What is the most someone can lose the popular vote

I think @meriton's second suggestion is the neatest. –OldCurmudgeon Sep 26 '12 at 0:01 add a comment| Your Answer draft saved draft discarded Sign up or log in Sign up Join them; it only takes a minute: Sign up Why can you access static field before it is defined through a method in Java? Why is (a % 256) different than (a & 0xFF)?