Read utf-8 file return utf-16 coding hex string ?

Hi All
Why using utf-8, the hex value return 51cc and 6668 ?

od -cx utf8_file01.text

22e5 878c e699 a822 with " befor and after

http://www.fileformat.info/info/unicode/char/51cc/index.htm
http://www.fileformat.info/info/unicode/char/6668/index.htm

Output
......
101 ? 20940 HEX=51cc BIN=101000111001100
102 ? 26216 HEX=6668 BIN=110011001101000

Java program

import java.nio.charset.Charset ;
import java.io.*;
import java.lang.String.*;
import java.lang.Integer.*;
public class read_utf_line {
public static void main(String[] args) {
File aFile = new File("utf8_file01.text");
try {
    System.out.println(aFile);
    String str = "";
    String hexstr = "";
    String bystr = "";
    int stlen= 0;
    Integer val=0;
    BufferedReader in = new BufferedReader(
        new InputStreamReader(new FileInputStream(aFile), "UTF8"));

   while (( str = in.readLine()) != null )
   { stlen = str.length();
        System.out.println(str.length());
        for (int i = 0;i < stlen;++i) {
             val = str.codePointAt(i);
             hexstr = Integer.toHexString(val);
             bystr = Integer.toBinaryString(val);

             System.out.println(i + " " + str.substring(i,i+1)
              + " " + str.codePointAt(i)
              + " HEX=" + hexstr
              + " BIN=" + bystr
              );
        }
   }
} catch (UnsupportedEncodingException e) {
} catch (IOException e) {
}

}
}