刚刚登录appengine的时候才发现开始支持java了。
上午的时候还没有。

对java的比较熟悉，但是还是喜欢比较简洁的python

http://code.google.com/intl/zh-CN/appengine/docs/java/overview.html

<http://googleappengine.blogspot.com/2009/04/seriously-this-time-new-language- on-app.html>

这是注册试用后google appengine给发的邮件:

Hello,

Thanks for signing up to try Google App Engine for Java! Your account has now
been activated, so you can begin building applications with our new Java
runtime.

Please note that this is still an early look at our support for the Java
language and you may encounter issues during development. We look forward to
hearing your feedback! To learn more, please visit:

http://code.google.com/appengine/docs/java/overview.html

To start creating applications with Google App Engine, simply follow this link
(you may need to sign in with your [email protected] Google Account) and
verify your account with a mobile phone number if you have not already done so:

http://appengine.google.com/

If you are having trouble verifying your account via SMS please fill
out the following form and your account will be reviewed and enabled
as soon as possible:

http://appengine.google.com/waitlist/sms_issues

Thanks!
The Google App Engine Team

Java is a registered trademark of Sun Microsystems, Inc.