Cannot Find The Symbol Error In Java
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Java Error Cannot Find Symbol Variable
ads with us Stack Overflow Questions Jobs Documentation Tags Users Badges Ask Question x Dismiss Join the Stack Overflow Community Stack java error cannot find symbol constructor Overflow is a community of 4.7 million programmers, just like you, helping each other. Join them; it only takes a minute: Sign up What does a “Cannot find symbol” compilation error mean? up vote java error cannot find symbol class 110 down vote favorite 38 Please explain the following about the "Cannot find symbol" error: What does this error mean? What things can cause this error? How does the programmer go about fixing this error? This question is designed to be a comprehensive question about "cannot find symbol" compilation errors in Java. java compiler-errors cannot-find-symbol share|improve this question edited Feb 27 at 17:29 BalusC 682k20324712691 asked Sep 7
Java Error Identifier Expected
'14 at 1:12 Stephen C 386k44410738 add a comment| 6 Answers 6 active oldest votes up vote 141 down vote accepted 1. What does a "Cannot find symbol" error mean? Firstly, it is a compilation error1. It means that either there is a problem in your Java source code, or there is a problem in the way that you are compiling it. Your Java source code consists of the following things: Keywords: like true, false, class, while, and so on. Literals: like 42 and 'X' and "Hi mum!". Operators and other non-alphanumeric tokens: like +, =, {, and so on. Identifiers: like Reader, i, toString, processEquibalancedElephants, and so on. Comments and whitespace. A "Cannot find symbol" error is about the identifiers. When your code is compiled, the compiler needs to work out what each and every identifier in your code means. A "Cannot find symbol" error means that the compiler cannot do this. Your code appears to be referring to something that the compiler doesn't understand. 2. What can cause a "Cannot find symbol" error? As a first order, there is only one cause. The compiler looked in all of the places where the identifier should be defined, and it couldn't find the defi
expression incompatible types invalid method declaration; return type required java.lang.ArrayIndexOutOfBoundsException:
Cannot Find Symbol Error In Java Compile
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cannot find symbol "Cannot find http://stackoverflow.com/questions/25706216/what-does-a-cannot-find-symbol-compilation-error-mean symbol" errors generally occur when you try to reference an undeclared variable in your code. Consider the following example: public class Test { public static void main(String[] args) { int a = 3; int b = 4; int c = 20; average = (a + b + c)/5.0; System.out.println(average); } } 1 error found: http://cs-people.bu.edu/dgs/courses/cs111-old/assignments/errors.html File: Test.java [line: 7] Error: Test.java:7: cannot find symbol symbol : variable average location: class Test Here, the variable average has not been declared-- you need to tell the compiler what the type of average is; for example: double average = (a + b + c)/5.0; Secondly, sometimes this error occurs because you are trying to reference a method in your code, but forget to include the parentheses that indicate a reference to a method, even when there are no parameters. For example: public class Test { public static void main(String[] args) { my_method; } public static void my_method() { System.out.println("Hello, world!"); } } 1 error found: File: Test.java [line: 7] Error: Test.java:7: cannot find symbol symbol : variable my_method location: class Test Here, the compiler is looking for a variable called my_method in the main method; instead, you want to initiate a method call to my_method: public class Test { public static void main(String[] args) { my_method(); } public sta- Cannot Find Symbol jsyersiii SubscribeSubscribedUnsubscribe77 Loading... Loading... Working... Add to Want to watch this again later? Sign in to add this video to a playlist. Sign in Share More Report Need to report the video? Sign in to report inappropriate content. Sign https://www.youtube.com/watch?v=GaLhKxdKdOk in Statistics 9,422 views 2 Like this video? Sign in to make your opinion count. Sign in 3 17 Don't like this video? Sign in to make your opinion count. Sign in 18 Loading... Loading... Loading... Rating https://netbeans.org/bugzilla/show_bug.cgi?id=123886 is available when the video has been rented. This feature is not available right now. Please try again later. Uploaded on Dec 1, 2010 Category Education License Standard YouTube License Loading... Autoplay When autoplay is enabled, a cannot find suggested video will automatically play next. Up next Java Programming - Step by Step tutorial - Duration: 1:27:25. Patrick WashingtonDC 2,764,478 views 1:27:25 Fixing cannot find symbol in Java - Duration: 7:05. Brandan Jones 616 views 7:05 How to solve cannot find symbol error in Java? - Duration: 1:42. roseindiatutorials 1,480 views 1:42 Java Programming Tutorial 06 Syntax Errors and Logical Errors - Duration: 5:50. Gaute Michel Ferstad 5,989 views 5:50 Java package cannot find symbol system does not exist probles solved - Duration: 2:04. Sakaros Zulu 5,643 views 2:04 Programming is terrible—Lessons learned from a life wasted. EMF2012 - Duration: 1:06:44. Thomas Figg 1,238,116 views 1:06:44 Common Syntax Errors - Java - Duration: 3:34. Jeff Miller 575 views 3:34 Java Syntax Error: Incompatible types - Duration: 3:36. jsyersiii 1,668 views 3:36 Java Programming Terms and Common Syntax Errors - Duration: 41:28. Brandan Jones 1,495 views 41:28 |Windows| Set Up Your Java path (Java Path Error Fix!) - Duration: 3:23. KillerUnicorns 6,569 views 3:23 Java Common Syntax Errors using TextPad - Duration: 12:20. Derrf Seitz 469 views 12:20 how to declare identifiers in java - Duration: 1:47. kapil gupta 549 views 1:47 How to compile your java file's or fix Java Error's! - Duration: 3:15. NicoDaPko 35,765 views 3:15 1-8: Syntax and Run-time Errors - Duration: 9:30. Kent D. Lee 6,325 views 9:30 how to import modules or libraries in intellij idea ~ cannot find symbol TextIO error - Duration: 0:58. Kreate Perfulchri 258 views 0:58 How To Compile A Java Program With Javac - Duration: 2:44. shaffy 259,645 views 2:44 Computer Networking & Hardware : What Is a Syntax Error? - Duration: 1:30. eHow 923 views 1:30 Java Tutorial 1 - For Beginners (Basic Syntax) - Duration: 8:29. John Gizdich 104,761 views 8:29 Ja
hint is shown even if the class exists Summary: "cannot find symbol"-error hint is shown even if the class exists Status: RESOLVED DUPLICATE of bug 118879 Product: java Classification: Unclassified Component: Editor Version: 6.x Hardware: All All Priority: P2 with 2 votes (vote) TargetMilestone: TBD Assigned To: Jan Lahoda QA Contact: issues@java URL: Whiteboard: Keywords: Duplicates: 117502 (view as bug list) Depends on: Blocks: Show dependency tree /graph Reported: 2007-12-12 14:57 UTC by fireblaze Modified: 2008-09-02 06:28 UTC (History) CC List: 1 user (show) pribyl See Also: Issue Type: DEFECT Exception Report : Attachments stacktrace (471 bytes, text/plain) 2008-03-26 10:31 UTC, ndganesan Details stacktrace (471 bytes, text/plain) 2008-06-23 12:51 UTC, amit_yadav Details View All Add an attachment (proposed patch, testcase, etc.) Note You need to log in before you can comment on or make changes to this bug. Description fireblaze 2007-12-12 14:57:38 UTC "cannot find symbol"-error hint light up on some package-local classes, the code compiles but Netbeans IDE report that the code can not be found. It does not happen if the file that contains the package-local class is open. Comment 1 Jan Lahoda 2007-12-12 22:28:58 UTC Do you have a test case reproducible from scratch? It is very hard to do anything about it without a reproducible test case. Comment 2 nicolo 2008-01-07 13:25:19 UTC It happened to me too: when i call a method of a class which doesn't have directly the method but extends a class which extends a class whitch extends a class of a Jar imported in the project. for example i call x.meth(); x is an istance of the class X. X doesn't have the method meth() but extends A. A doesn't have the method meth() but extends B. B is contained in a Jar imported as libra