说明：  学习java的时候，看了好多java的历史、优点和应用范围。对于这些知识，并不难理解。我也当然同意java是一种优秀的计算机语言
(Learning java, when looked at history, a lot of advantages and applications of java. For this knowledge, not difficult to understand. I certainly agree that java is also an excellent computer language)