Why your JavaService does not already reply with a StringList?
Open your JavaService with developer, in the output insert a StringList, for example named “StringListOutput”.
Now under menu tools → Generate Code → Select your service → Generate code: For implementing this service → Output → All fields.
Now your clipboard has this:
Now in your service fill in the StringList !
#Integration-Server-and-ESB#Flow-and-Java-services#webMethods