In the land where Java flows freely I have encountered many that are not familiar with AJAX and ask many of the same questions. I put together this FAQ with developers that use Java and Java Enterprise Edition in mind.

Some of the questions I have addressed include:

1. Should I consider AJAX?
2. Does AJAX work with Java?
3. Won't my framework provide me with AJAX?
4. Where should I start?
5. What do I need to know?
6. Do I really need to learn JavaScript?
7. What JavaScript Libraries and Frameworks are out there to assist a Java developer?
8. Should I use XML or text, JavaScript, or HTML as a return type?
9. Are there usability issues with AJAX?
10. How do I test JavaScript?
11. Should I use an HTTP GET or POST for my AJAX calls?
12. How do I provide internationalized AJAX interactions?
13. How do I handle concurrent AJAX requests?
14. What do I do on the server to interact with an AJAX client?
15. Where do I store state with an AJAX client?
16. How do I submit a form or a part of a form without a page refresh?
17. Is the server or the client in control?
18. Are there any security issues with AJAX?
19. When do I use a synchronous versus a asynchronous request?
20. What about applets and plugins?
21. How do I handle the back and forward buttons?
22. How do I send an image using AJAX?
23. How do I create a thread to do AJAX polling?

These questions are not all Java related but are common things a web developer starting with AJAX may ask.

What questions would you like addressed?