title: Get same unique id for same string
body: <p>Is there a way to find the same integer/long or any digit number equivalent to a given string using java.</p>
  
  <p>e.g If i give a string "Java_programming" it should give me always something like "7287272" digit.</p>
  
  <p>The generated digit/number should be unique i.e. it should always generate "123" for "xyz" not "123" for "abc".</p>