code: public static long max(long a, final long b, final long c) {
          if (b > a) {
              a = b;
          }
          if (c > a) {
              a = c;
          }
          return a;
      }
docs: <p>Gets the maximum of three <code>long</code> values.</p>
  
  @param a  value 1
  @param b  value 2
  @param c  value 3
  @return  the largest of the values