Java "NoSuchMethodError"

java nosuchmethoderror
vrm picture vrm · Sep 12, 2010 · Viewed 48.8k times · Source

I'm getting: 

NoSuchMethodError: com.foo.SomeService.doSmth()Z

Am I understanding correctly that this 'Z' means that return type of doSmth() method is boolean? If true, then that kind of method really does not exist because this method returns some Collection. But on the other hand if I call this method, I'm not assigning its return value to any variable. I just call this method like this:

service.doSmth();

Any ideas why this error occurs? All necessary JAR files exist and all other methods from this class seems to exist.

Answer

amorfis picture amorfis · Sep 12, 2010

Looks like method exists in classpath during compilation, but not during running of your application.

I don't think return type is a problem. If it was, it wouldn't compile. Compiler throws error when method call is ambiguous, and it is when two methods differ only by return type.

Related questions

How do I fix a NoSuchMethodError?

I'm getting a NoSuchMethodError error when running my Java program. What's wrong and how do I fix it?

Read More
"Error: Main method not found in class MyClass, please define the main method as..."

New Java programmers often encounter these messages when they attempt to run a Java program. Error: Main method not found in class MyClass, please define the main method as: public static void main(String[] args) or a JavaFX application class …

Read More
Interpreting java.lang.NoSuchMethodError message

I get the following runtime error message (along with the first line of the stack trace, which points to line 94). I'm trying to figure out why it says no such method exists. java.lang.NoSuchMethodError: com.sun.tools.doclets.formats.…

Read More