Displaying japanese chars using servlet (posted in Java programming too)

I am trying to display the japanese characters inputed by the user using
html form and I am using servlet...
After reading the input and when i try to display i get ????
how can i solve this.
It was originally posted in Java Programming forum. but i think the question suits here....heres the link for original post
http://forum.java.sun.com/thread.jspa?threadID=670419&tstart=0
sorry for posts at two different forums

After reading the input and when i try to displayDisplay on what?
Usually, if request.getCharacterEncoding() doesn't return viable result, then you should call
request.setCharacterEncoding() with a proper value. If user send Shift_JIS string as form
input, then the argument value should be also "Shift_JIS". When in doubt, use "UTF-8".
Then, you call response.setContentType("text/html; charset="Shift_JIS"), etc.

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