1:Code Conventions for the Java TM Programming Language（java 编程规范）html
http://www.oracle.com/technetwork/java/codeconvtoc-136057.htmljava
2:The Java Language Specification（java 语言规范）
http://java.sun.com/docs/books/jls/index.html编程
有html和pdf离线版本，能够下载在本机浏览 oracle
3:The Java EE 6 Tutorial
http://download.oracle.com/javaee/6/tutorial/doc/index.htmlurl