【推荐】2019 Java 开发者跳槽指南.pdf(吐血整理) >>> 
JDK API 帮助文档 :
JDK 5 :
Java SE 5 API 中文版 CHM 下载:http://download.java.net/jdk/jdk-api-localizations/jdk-api-zh-cn/builds/JDK_API_1_5_zh_CN.CHM
JAVASE5 EN Downloads: http://javadoc.allimant.org/dist/jdk150.zip
JDK 6 :
JDK6 API 中文版下载: https://jdk-api-zh-cn.dev.java.net/
JDK6 API 中文版 HTML 格式在线文档：http://download.java.net/jdk/jdk-api-localizations/jdk-api-zh-cn/builds/latest/html/zh_CN/api/
JDK6 API 中文版zip 格式下载： http://download.java.net/jdk/jdk-api-localizations/jdk-api-zh-cn/builds/latest/html_zh_CN.zip
JDK6 API CHM中文参考下载:http://chinesedocument.com/upimg/soft/JDK6API中文参考070114.rar
Java SE 6 API 中文版 CHM 下载:http://download.java.net/jdk/jdk-api-localizations/jdk-api-zh-cn/publish/1.6.0/chm/JDK_API_1_6_zh_CN.CHM
ZIP格式：http://download.java.net/jdk/jdk-api-localizations/jdk-api-zh-cn/publish/1.6.0/html_zh_CN.zip
English Version : http://javadoc.allimant.org/dist/j2se6.zip
JDK 7 :
English Verson: http://download.java.net/jdk7/docs/api/
http://www.java.net/download/jdk7/archive/b138/jdk-7-ea-bin-b138-apidocs-14_apr_2011.zip
来源：oschina
链接：https://my.oschina.net/u/1011578/blog/517963