Double Byte Characters for Japanese Kanji Language

Hello All,
How can you identify the Double Byte characters and how we can check whether they are double byte characters  or not.
Can you please tell me the double byte characters from Japanese Kanji language for the characters.
This is very urgent.I will reward you with points.
Thanks,
Karan

*& Report  YTEST_LOGIC
REPORT  teched_unicode_solution_1               .
*** Exercise 1: Distinction between byte and character length
*** after Unicode enabling
parameter: param type c.
PERFORM test1 USING param.
*  FORM test1
FORM test1 USING text TYPE c.
  DATA: len1 TYPE i,
        len2 TYPE i,
        off TYPE i.
DESCRIBE FIELD text LENGTH len1 IN BYTE MODE.
DESCRIBE FIELD text LENGTH len2 IN CHARACTER MODE.
WRITE:/ LEN1, LEN2.
ENDFORM.                                                    "test1
Use the above code to find which characters are double bytes and which are not...
The double byte characters will have double the length when they are in the byte mode..
reward points for helpful answers
Edited by: Rahul Kavuri on Mar 26, 2008 6:35 PM

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    public boolean containsDoubleByte(String s) {
      for (int i=0; i<s.length(); i++) {
        if (isDoubleByte(s.charAt(i)) {
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