9 links
Code Conventions for the Java Programming Language
java.sun.com
Coding Guidelines from Sun Microsystems.
How to Write Doc Comments for the Javadoc tool
java.sun.com
"Official" JavaDoc style guidelines from Sun Microsystems.
How To Write Unmaintainable Code
mindprod.com
A humorous approach emphasizing the need for coding standards - Java centric discussion.
Java Programming Style Guide
joot.com
By Dave Jarvis, Shawn Potter. Basic techniques and stylistic suggestions to help with developing maintainable Java source code.
Java Programming Style Guidelines
geosoft.no
A set of recommendations on various aspects of coding such as naming, file organization, and comments.
JavaRanch: Java Programming Style Guide
javaranch.com
Style guide focusing primarily on formatting and comments, as well as advice on which coding constructs to avoid.