Converting A String To Hexadecimal In Java

Question

I am trying to convert a string like \"testing123\" into hexadecimal form in java. I am currently using BlueJ.

And to convert it back, is it the same thing except b

Answer 1

Much better:

public static String fromHexString(String hex, String sourceEncoding ) throws  IOException{
    ByteArrayOutputStream bout = new ByteArrayOutputStream();
    byte[] buffer = new byte[512];
    int _start=0;
    for (int i = 0; i < hex.length(); i+=2) {
        buffer[_start++] = (byte)Integer.parseInt(hex.substring(i, i + 2), 16);
        if (_start >=buffer.length || i+2>=hex.length()) {
            bout.write(buffer);
            Arrays.fill(buffer, 0, buffer.length, (byte)0);
            _start  = 0;
        }
    }

    return  new String(bout.toByteArray(), sourceEncoding);
}