This week's book giveaway is in the OO, Patterns, UML and Refactoring forum. We're giving away four copies of Refactoring for Software Design Smells: Managing Technical Debt and have Girish Suryanarayana, Ganesh Samarthyam & Tushar Sharma on-line! See this thread for details.
Ani Sweety jacob wrote:i studied core java,what is the next level of JAVA to study?which one is more useful ?
That depends on your career goals etc.. You might go for certifications (SCJP,SCJD/SCWCD/SCBCD etc... ) or work in some projects to get more experience. And we have separate forums for all those certifications I mentioned which you might go through.