UPDATE: A new version of this gadget has been released. It is called the Developer Search Gadget and can be found here.
This version has support for languages other then Java like Ruby, PHP, CSS, and JavaScript etc.

The Java search Google Gadget searches the JavaDocs and Other API documentation for common API’s that I use.

So far you can use it to search:

• 1.6 JavaDoc
• 1.5.0 JavaDoc
• 1.4.2 JavaDoc
• Java Developers Almanac 1.4
• Servlet API 2.2
• Apache Axis
• Hibernate 3
• JConfig
• JDOM
• Jetty
• JGroups
• JUnit
• Log4j
• Memcached Java API
• Spring Framework

In the future I plan on adding:

• Ability to add API’s
• Feeling lucky search that goes to the first search result (DONE)

If anyone finds a bug or would like me to add an API please comment bellow.
If you want me to add an API for a project a link to the current JavaDocs would be good thanks.

** UPDATE 1st April 2007
Today I added a “I’m feeling lucky” search box that will go straight to the first search result page.
It also automatically selects the contents of the search box when it gets focus.