title: Determine if a String is an Integer in Java
body: <p>I'm trying to determine if a particular item in an Array of strings is an integer or not.</p>
  
  <p>I am <code>.split(" ")</code>'ing an infix expression in <code>String</code> form, and then trying to split the resultant array into two arrays; one for integers, one for operators, whilst discarding parentheses, and other miscellaneous items. What would be the best way to accomplish this? </p>
  
  <p>I thought I might be able to find a <code>Integer.isInteger(String arg)</code> method or something, but no such luck.</p>