Chinese Internationalisation

I need to save Chinese Characters through java application to database.
USing Java InputMethod Framework i was able to type chinese in textarea.
I also changed database field type to nvarchar2 and tried saving.
The data got from the textfield or textarea using getText() method is in '????' format.And the data saved in database is in some other format.
When i retrievd the value from database, and tried to set text in text area,nothing was displayed. Is this not the right way to do?How should i solve the problem?

I belive chinese characters are especially unplesant to handle because there is more than 256 of them (correct me if I'm wrong). If I were you I would do following steps:
1. Make sure your OS has proper chinese support. You should be able to display chinese windows titles, switch keyboard to chinese and have chinese font. If you have JEdit then beeing able to type chinese text in it will be good proof. There is chinese keyboard isn't it?
2. Get well prooven unicode codes for text you try to put in database. It can be done by editing document in JEdit and saving it with Unicode (16 bit) encoding. You can the open it in hex viewer and get codes for text;
3. When you get data from JTextField dump it to System.out character by character converting each of them to number ie. System.out.print(((int)my_string.charAt(i)) & 0xffff). Verify if it matches known codes. If it does, then input to Java works ok. If not, you may need to change system locale or do something about what I don't know at all. I don't know the byte order in unicode files so there would be better to dump codes in hex;
4. If typed text does not show correctly in JTextField but it has proper codes then problem is with font. Maybe you don't have chinese font which matches font familly used by JTextField. Reading about how Swing displays fonts will help here;
5. Once you have your Unicode data you have to make sure that your database can store it. Contact with database supplier if it supports either Unicode16 or UTF-8 encodings. If it does not, you are it troubles. If database is not unicode then it will make attempts to convert your texts to known selected code page. What is "nvarchar2" ? . Note, transfers to database goes through JDBC which may also do some unwanted conversions.
6. Transfer your text to database and read it back. Check again codes of characters to eliminate displaying problems.
If all above steps will not allow you to isolate problem feel free to ask again.
P.S.
If you are not tied to specific database there is a http:://www.mckoi.com/database

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