上游充鱼大警 SJTU School Of Software 2009-2-3 3.1 Java Why is Java Easy to get source code and documentation Completed test environment More free test tools J2SE Development kit 5.0 http://java.com/en/desktop/ 软件学院SJTU School Of Software 2009-2-3 软件学院 3.1 Java Why is Java ? ™ Easy to get source code and documentation ™ Completed test environment ™ More free test tools ™ J2SE Development kit 5.0 ™ http://java.com/en/desktop/