Display Byte value for GB2123 Character

Hi All

I want to display Charset for GB2312 character byte value. Using
codePointAt(i) just for Unicode code.
How to diaplay GB2123 byte value ?

For =B2=E2 should be b2e2
For =CA=D4 should be cad4

cat temp.txt

TEST1|=B2=E2=CA=D41
TEST2|=B2=E2=CA=D42
TEST3|=B2=E2=CA=D43

import java.io.*;
public class Readfile00 {
   public static void main(String[] args)
       throws UnsupportedEncodingException {
     String icp = "GB2312";
     String ifn = "temp.txt";
     PrintStream sysout = new PrintStream(System.out, true, icp);
try {
    File oFile = new File("out_utf.text");

    BufferedWriter out = new BufferedWriter(
        new OutputStreamWriter(new FileOutputStream(oFile),icp));

     String a = "" ;
     char ch ;
     Integer val=0;
     String hexstr = "";

     BufferedReader in = new BufferedReader(
         new InputStreamReader(new FileInputStream(ifn), icp));

    while (( a = in.readLine()) != null)
    {
     int n = a.length();
     sysout.println(a);
     sysout.printf("Length of string is %d%n", n);
     sysout.printf("CodePoints in string is %d%n",
a.codePointCount(0,n));
     for (int i = 0; i < n; i++) {
       ch = a.charAt(i);
       val = a.codePointAt(i); // Return Unicode code point
       hexstr = Integer.toHexString(val);
       Character.UnicodeBlock block = Character.UnicodeBlock.of(ch);
       sysout.printf("Chr[%4d] DEC=%5s UTF-16=%5s is %4s %s %n", i,
val, hexstr, a.charAt(i),block);
       //byte bv = (byte) ch;
       //System.out.println("Byte is:=" + bv);
       out.write(a.charAt(i));
     }
      out.newLine();
     }
     out.close() ;
     System.out.printf("File %s\n", oFile);
} catch (IOException e) {
    System.out.println(e);
}
}

}