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Bytes to hex string

/ Published in: Java
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  1. public String bytesToHexString(byte[] b)
  2.     {
  3.         final char [] chars = new char[]
  4.             {'0','1','2','3','4','5','6','7','8','9', 'A','B','C','D','E','F'};
  5.  
  6.         if ((b == null) || (b.length == 0)) {
  7.             throw new IllegalArgumentException("argument null or zero length");
  8.         }
  9.         StringBuffer buff = new StringBuffer(b.length * 2);
  10.  
  11.         for (int i = 0; i < b.length; i++ ) {
  12.             buff.insert(i*2,chars[(b[i] >> 4) & 0xf]);
  13.             buff.insert(i*2+1,chars[b[i] & 0xf]);
  14.         }
  15.  
  16.         return buff.toString();
  17.     }

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