getting updated value
One answer
You need to fetch/resolve the work item in the API again. See https://rsjazz.wordpress.com/2013/03/20/understanding-and-using-the-rtc-java-client-api/ and https://rsjazz.wordpress.com/2013/01/02/working-with-work-item-attributes/
The question is not well written and thus I would suggest you also carefully read How should I ask a question in the Forum if I want to receive useful answers?
Also tag your questions with a product name such as rational-team-concert as this forum is for many products.