Convert Hex to Byte with big string

Convert Hex to Byte with big string

I tried the different ways to convert hex to byte, there are four methods
in the code, three of them i comment it out, only one there is no error
when i run it, but i confused that when i repeated to run the code, it
gave me the different result (should be generate "byte").
There is a question is when i use "method1", it gave me the result (byte),
but once i changed to "method2", it will not generate the result, i dont
know why. I thought it should generate same result, when i have same
string.
public class Convert {
/**
* @param args
* @throws IOException
*/
// String everything;
public static void main(String[] args) throws IOException {
//String everything;
// TODO Auto-generated method stub
BufferedReader br = null;
try {
br = new BufferedReader(new FileReader("C:\\TEMP1\\Doctor.txt"));
} catch (FileNotFoundException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
try {
StringBuilder sb = new StringBuilder();
String line = null;
try {
line = br.readLine();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
while (line != null) {
sb.append(line);
sb.append('\n');
line = br.readLine();
}
//*********Method 1****************
//String
r="1ee079746828d7c6f9af46f93c1ef2555ff4b14b2378ad53a258d18dc6a8363fb57f3448783833722bd9ef291ba53153afca31a96de404755e78f68b76fd5a77e4be3b984ea25244842e92a8ed40da1f1a588fb3da26b8bc21d74cd8476534f26ee454df086567c4d7cf3334f794cede41a9b051a5c393a35584afcf";
//byte[] b = new BigInteger(r,16).toByteArray();
//System.out.println("Byte for public key: "+b);
//*********Method 2****************
//String r2 = sb.toString();
//System.out.println("Doctor contect file: "+r2);
//byte[] b = new BigInteger(r2,16).toByteArray();
//System.out.println("Byte for public key: "+b);
//********Method 3*****************
String
r="1ee079746828d7c6f9af46f93c1ef2555ff4b14b2378ad53a258d18dc6a8363fb57f3448783833722bd9ef291ba53153afca31a96de404755e78f68b76fd5a77e4be3b984ea25244842e92a8ed40da1f1a588fb3da26b8bc21d74cd8476534f26ee454df086567c4d7cf3334f794cede41a9b051a5c393a35584afcf";
int len = r.length();
byte[] data = new byte[len / 2];
for (int i = 0; i < len; i += 2) {
data[i / 2] = (byte) ((Character.digit(r.charAt(i), 16) << 4)
+ Character.digit(r.charAt(i+1), 16));
System.out.println(data);
}
//********Method4******************
/*
String r2 = sb.toString();
int len = r2.length();
byte[] data = new byte[len / 2];
for (int i = 0; i < len; i += 2) {
data[i / 2] = (byte) ((Character.digit(r2.charAt(i), 16)
<< 4)
+ Character.digit(r2.charAt(i+1), 16));
System.out.println(data);
}
*/
//String r=everything;
// String
r="1ee079746828d7c6f9af46f93c1ef2555ff4b14b2378ad53a258d18dc6a8363fb57f3448783833722bd9ef291ba53153afca31a96de404755e78f68b76fd5a77e4be3b984ea25244842e92a8ed40da1f1a588fb3da26b8bc21d74cd8476534f26ee454df086567c4d7cf3334f794cede41a9b051a5c393a35584afcf";
// double convert=Double.parseDouble(r);
// long convert=(long)(Integer.parseInt(r,32)&0xFF);
// byte convert=Byte.parseByte(r,32);
// byte convert=Integer.parseInt(everything,16);
// System.out.println("Byte for public key: "+convert);
} finally {
br.close();
}
}
}