各种在线api地址
J2SE1.7英文api地址: http://download.oracle.com/javase/7/docs/api/
J2SE1.6英文api地址: http://download.oracle.com/javase/6/docs/api/
J2SE1.5 英文api地址:http://download.oracle.com/javase/1.5.0/docs/api/J2SE1.4 英文api地址:http://download.oracle.com/javase/1.4.2/docs/api/
J2EE1.5英文api地址: http://download.oracle.com/javaee/5/api/
J2EE1.6英文api地址: http://download.oracle.com/javaee/6/api/
J2EE1.4英文api地址: http://download.oracle.com/javaee/1.4/api/
J2SE1.6中文api地址:http://www.xasxt.com/java/api/
J2SE1.6 中文api地址: http://dlc.sun.com.edgesuite.net/jdk/jdk-api-localizations/jdk-api-zh-cn/publish/1.6.0/html/zh_CN/api/index.html
J2SE1.5中文api地址: http://www.gznc.edu.cn/yxsz/jjglxy/book/Java_api/index.html?overview-summary.html