text: An emirp (prime spelled backwards) is a prime number that results in a different prime when its decimal digits are reversed.[1] This definition excludes the related palindromic primes. The term reversible prime is used to mean the same as emirp, but may also, ambiguously, include the palindromic primes.
  
  The sequence of emirps begins 13, 17, 31, ...
  
  Please generate java source code to claculate the first 100 emirp numbers.