Oracle has an Oracle Technology Network (OTN) for which membership is free. For further details, visit https://www.oracle.com/technetwork/community/join/overview/index.html.
OTN membership has the following benefits:
- The opportunity to participate in discussion forums
 - Free software
 - Free online workshops
 - Access to Java API documentation
 - Community engagement
 - Access to technical articles
 - Blogs featured by Oracle employees
 - Access to sample code
 - Newsletter subscription
 - Discounts on events, books, products, and other resources
 - Social engagement via:
 - YouTube
 - Blogs