title: Java Convert String to byte[]
body: <p>I wonder how you should do if you are going to convert an String that contains an array of bytes, actually bytes from an image into an byte array.</p>
  
  <p>I guess this is a pretty common issue so i guess someone could give any suggestions.</p>
  
  <p>If it is better to convert an JSONArray into an byte array i would like to know why.</p>