読者です 読者をやめる 読者になる 読者になる

Fight the Future

何かを始めたら、半分成功したのと同じ

Javaの黒帯!?

http://www.javablackbelt.com/jbb/

JavaBlackBelt is a community for Java & open source skills assessment.
This is the place where Java developers have their technology knowledge and development abilities recognized. It is dedicated to technical quizzes about Java related technologies.