title: Extract digits from string - StringUtils Java
body: <p>I have a String and I want to extract the (only) sequence of digits in the string. </p>
  
  <p>Example:
  helloThisIsA1234Sample.
  I want the 1234</p>
  
  <p>It's a given that the sequence of digits will occur only once within the string but not in the same position.</p>
  
  <p>(for those who will ask, I have a server name and need to extract a specific number within it)</p>
  
  <p>I would like to use the StringUtils class from Apache commomns.   </p>
  
  <p>Thanks!</p>