JDK 1.8 API
* HTML 格式(在线英文) http://docs.oracle.com/javase/8/docs/api/
JDK 1.7 API
* HTML 格式(在线英文) http://docs.oracle.com/javase/7/docs/api/
* zip 格式(英文) http://download.oracle.com/otn-pub/java/jdk/7u11-b21/jdk-7u11-apidocs.zip
* CHM 格式(英文) http://download.csdn.net/download/sbfivwsll/4275064
JDK 1.6 API(全)
* HTML 格式(在线英文) http://docs.oracle.com/javase/6/docs/api/
* HTML 格式(在线中文) http://dlc.sun.com.edgesuite.net/jdk/jdk-api-localizations/jdk-api-zh-cn/publish/1.6.0/html/zh_CN/api/index.html
或者 http://resource.ajava.org/java/jdk-api-1.6/
* zip 格式(中文) http://download.java.net/jdk/jdk-api-localizations/jdk-api-zh-cn/publish/1.6.0/html_zh_CN.zip
* zip 格式(英文) http://javadoc.allimant.org/dist/j2se6.zip
* CHM 格式(中文) http://download.java.net/jdk/jdk-api-localizations/jdk-api-zh-cn/publish/1.6.0/chm/JDK_API_1_6_zh_CN.CHM
* CHM 格式(英文) http://download.csdn.net/source/3117440
JDK 1.5 API
* HTML 格式(在线英文) http://docs.oracle.com/javase/1.5.0/docs/api/
* HTML 格式(在线中文) http://resource.ajava.org/java/jdk-api-1.5/