IntelliJ IDEA 14.0 添加及显示 JDK DOC

1. src.zip 在 安装的JDK中已经包含。docs 网络上下载 

1. JDK7 doc :  http://www.oracle.com/technetwork/java/javase/documentation/java-se-7-doc-download-435117.html

2. JDK8 doc : http://www.oracle.com/technetwork/java/javase/documentation/jdk8-doc-downloads-2133158.html

2. 在IntelliJ Idea的File->Project Structure...->SDKs:

1. 把src.zip添加到Sourcepath

2. 把docs.zip添加到Documentation Paths  或者 https://docs.oracle.com/javase/8/docs/api/

3. View doc  Version 14.0+

1. File ->Settings -> Editor -> General      选择 show quick documentation on mouse move