Java “NoSuchMethodError”

Question

I\'m getting:

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

Am I understanding correctly that this \'Z\' means that return

Answer 1

This is probably a difference between your compile-time classpath and you run-time classpath.

Here is what seems to be going on:

• The code is compiled with a class path that defines the doSmth() method returning a boolean. The byte-code refers to the doSmth()Z method.
• At runtime, the doSmth()Z method isn't found. A method returning a Collection is found instead.

To correct this problem, check your (compile time) classpath.