Comment 35 for bug 85969

http://java.sun.com/javase/6/webnotes/install/jdk/install-docs.html

JavaTM SE 6 Release Notes
Document Installation

--------------------------------------------------------------------------------
 JDK Documentation

You should have approximately 165 MB of free disk space before installing the documentation.

Install the Java Platform Standard Edition documentation by following these steps:

1. Where to unbundle your documentation

You can install the documentation inside your JDK directory or in any other location you prefer.
Unbundling the JDK documentation creates a docs directory (folder) in the current directory, putting all the documentation inside that directory as shown here.

*******(documents) docs (APIs)
******___________________________|__________________________
*****| | | | | | | |
index.html legal technotes images api platform jre jdk
***************_______|_______
**************| | |
************tools samples guides

2. Unbundle your documentation
Unbundle the documentation using the a zip-compatible utility such as winzip, unzip, gunzip, or pkunzip. Your utility must support long file names.
To unbundle the documentation bundle using the zip utility:

C:> unzip jdk-6-doc.zip

You can also unbundle the .zip file using the JDK's jar utility:

C:> jar xvf jdk-6-doc.zip

Note: If you are using another tool that doesn't preserve path names by default, be sure to specify that path names be preserved. For example, if you are using pkunzip, specify -d:

C:> pkunzip -d jdk-6-doc.zip

Unzipping the documentation bundle creates a docs/ directory containing your Java Platform documentation.
3. View the documentation
Open the docs/index.html page in a browser. This is the front page and table of contents of the JDK documentation.