I am working on enhancing a project developed some time ago and none of the people that worked on it are there now!
There is a package java.util.concurrent that is used, but the JRE 1.4 does not have it. I tried upgrading to JRE 6 but even then I get the same error saying that particular package (and associated classes Callable etc) are not found.
Is there a specific jar that I need?
I have the following in my Rational Application Developer Java Build Path (please see attached image):
Any help greatly appreciated. I cannot proceed until I fix this
If you're using Eclipse, it would be a good idea to check the JDK Compliance setting for the project (Under Project Properties -> Java Compiler). If the compliance level is set to, say 1.4, you'll not get any new API from JDK 5 or 6, no matter what JDK you use.
And, by the way, the API you're looking for is in 'rt.jar' along with all other core APIs.