No Such Method Found Error Java
Contents |
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
No Such Method Error Android
hiring developers or posting ads with us Stack Overflow Questions Jobs Documentation Tags Users Badges Ask java nosuchmethoderror but method exists Question x Dismiss Join the Stack Overflow Community Stack Overflow is a community of 6.2 million programmers, just like you, helping each other. no such method error ljava/lang/string Join them; it only takes a minute: Sign up How do I fix a NoSuchMethodError? up vote 66 down vote favorite 14 I'm getting a NoSuchMethodError error when running my Java program. What's wrong and how do I fix
Nosuchmethoderror In Java At Runtime
it? java nosuchmethoderror share|improve this question edited Apr 26 '12 at 0:34 Charles Menguy 20.3k135893 asked Aug 29 '08 at 20:04 John Meagher 9,62294250 3 In Netbeans: Right click on project in Projects tab, use "Clean and Build". Solved it for me. –Heinzlmaen Jan 20 at 12:50 add a comment| 13 Answers 13 active oldest votes up vote 101 down vote accepted Without any more information it is difficult to pinpoint the problem, but the root cause is
Java Lang Nosuchmethoderror At Runtime
that you most likely have compiled a class against a different version of the class that is missing a method, than the one you are using when running it. Look at the stack trace ... If the exception appears when calling a method on an object in a library, you are most likely using separate versions of the library when compiling and running. Make sure you have the right version both places. If the exception appears when calling a method on objects instantiated by classes you made, then your build process seems to be faulty. Make sure the class files that you are actually running are updated when you compile. share|improve this answer answered Aug 29 '08 at 20:14 Vetle 1,35311626 We recently discovered the cause of one of these and it turned out the build process was putting class files in place before the java server was shut down, and we hit this because the java server hadn't loaded some classes, and then it did load some but it got these new ones, and since the new code referred to methods that the old classes didn't have... bingo, NoSuchMethodError –vazor May 6 '15 at 16:30 add a comment| up vote 62 down vote I feel your pain. You can learn programming out of a book, but when it comes to working with Eclipse or Visual Studio, its a ^&^&'n nightma
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 no such method error init hiring developers or posting ads with us Stack Overflow Questions Jobs Documentation Tags Users Badges
Nosuchmethoderror Main
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.nosuchmethoderror v Join them; it only takes a minute: Sign up Causes of 'java.lang.NoSuchMethodError: main Exception in thread “main”' up vote 45 down vote favorite 9 New Java programmers often encounter this message when they attempt to run a Java http://stackoverflow.com/questions/35186/how-do-i-fix-a-nosuchmethoderror program: java.lang.NoSuchMethodError: main Exception in thread "main" What does this mean, what can cause it, and what should one do to fix it? java main nosuchmethoderror share|improve this question edited Mar 24 '13 at 1:23 community wiki 4 revs, 3 users 81%Stephen C Just guessing they're calling a function that doesn't exist, but the compiler is supposed to stop you if you were to do that. –eternalmatt Mar 23 '11 at 15:04 Wikification complete. http://stackoverflow.com/questions/5407250/causes-of-java-lang-nosuchmethoderror-main-exception-in-thread-main –Tim Post♦ Mar 23 '11 at 15:07 @eternalmatt - This is a case that the compiler cannot deal with. See my answer for details. –Stephen C Oct 8 '14 at 6:09 add a comment| 7 Answers 7 active oldest votes up vote 28 down vote accepted When you use the java command to run a Java application from the command line, e.g., java some.AppName arg1 arg2 ... the command loads the class that you nominated, and then looks for the entry point method called main. More specifically, it is looking for a method that is declared as follows: package some; public class AppName { ... public static void main(String[] args) { // body of main method follows ... } } The specific requirements for the entry point method are: The method must be in the nominated class. The name of the method must be "main" with exactly that capitalization1. The method must be public. The method must be static 2. The method's return type must be void. The method must have exactly one argument and the type of that argument must be String[] 3. (The String[] argument is used to pass the arguments from the command line, and is required even if your application takes no command line arguments.) If any one of the above requirements is not satisfied, the java command will fail with the message: java.lang.NoSuchMethodError: main Exceptio
trying to indicate us that the method you invoked is not available in the classor in an interface. You could have also http://craftingjava.blogspot.com/2012/07/javalangnosuchmethoderror.html seen this error thrown when executing a class that has no public static void main() method.To know the reason behind this read this post. When you try to invoke a method that is no longer available in a class then at the compile time itself you will be shown an error message "cannot find symbol". So you may no such think how come this error is thrown when launching a program or an application. I have explained the fact behind this issue using the following programs. Let's have a class Nomethodand Pro1as follows, Nomethod class: import java.util.*; class Nomethod { public static void main(String args[]) { Pro1 s=new Pro1(); s.display(); } } Pro1 class: class Pro1 { public no such method void display() { System.out.println("I am inside display"); } } When you execute this program it will work fine without showing any errors.Now look at what happens when i change the class Pro1as follows and compile this class alone. Example1: class Pro1 { } Example2: class Pro1 { public int void display() { System.out.println("I am inside display"); return 1; // for example i have included a statement like this } } Now if you execute the classNomethodwithout recompiling it then you will beembarrassedby this java.lang.NoSuchMethodError at run-time. 1. If you change the classPro1as shown inExample1,thenthis exception will be thrown because there is no method display()available in that class. 2. If you consider the Example2this error is thrown because the signature of the method display()has been changed. If you understand this examples then you might have understood the reason for this error thrown when executing a class that has no main() method. The real fact is that "binary compatibility with the pre-existing binaries(classes) have been compromised by the new binaries(modified classes)". "when you cha