title: String as \x03\x00\x00\x00 to integer
body: <p>Helo:</p>
  
  <p>I have a question, that I solved in c, but now I want to do it in hava:
  I have a String like: '\x03\x00\x00\x00' 
  This is representing an hexadecimal value of a integer. I transform to 0x03\0x00...
  And now I want to obtain the integer, but I don't know how to do it in java</p>
  
  <p>could someone give me some idea ?</p>
  
  <p>Thanks in advance</p>
  
  <p>(Is it some way to use this format ('\x03\x00\x00\x00' ) directly without use byte[] arrays? and in C can I use this format directly to build a integer (int)?)</p>