title: Java hash utilities
body: <p>I'm looking for a good <strong>hash utility</strong> or <strong>framework</strong> to map the string to some int value in range say {1 .. k}
  I should use it in the runtime component that receives a lot of concurrent requests from users with 'userId' that is string and i want to map that value to defined integer range.</p>
  
  <p>Of course the length of the userId value could be different but it is ok with me to assumt on some minimum lenght for using this function</p>
  
  <p>It should be very fast</p>
  
  <p>Thanks</p>