
Excerpt:
As the Java platform has matured, designers and developers have recognized the need for consistent, compatible, and easy-to-use Java applications. The Java look and feel meets that need by providing a distinctive platform-independent appearance and standard behavior. The use of this single look and feel reduces design and development time and lowers training and documentation costs for all users.
This book sets standards for the use of the Java look and feel. By following these guidelines, you can create Java applications that effectively support all users worldwide, including those with physical and cognitive limitations.
Java Look and Feel Design Guidelines provides essential information for anyone involved in creating cross-platform applications and applets in the JavaTM programming language. In particular, this book offers design guidelines for software that uses the JavaTM Foundation Classes (JFC) together with the Java look and feel.

The Java Look and Feel Design Guidelines are also available as book.

Java™ Look and Feel Design Guidelines (2nd Edition)
by Sun Microsystems Inc., Inc. Sun Microsystems
Paperback: 416 pages ; Dimensions (in inches): 1.07 × 9.29 × 7.40
Publisher: Addison-Wesley Pub Co; 2nd Bk&CD edition (March 2001)
ISBN: 0201725886
Source:
> The Java Look and Feel Design Guidelines