内含三本书：《head first java》中文高清版、《java核心技术卷1-基础知识》英文版、以及《java基础教程》,对于初学者学习java有很大的帮助。-Contains three books: " head first java"　Chinese high-definition version of the java core technology Volume 1- the basics of the English version, and " java Essentials"　for beginners to learn java great help.