title: ArrayList<int> vs ArrayList<int[]>?
body: <p>I am not able to figure out why ArrayList&lt;<strong>int</strong>> is <strong>not</strong> <strong>allowed</strong> but ArrayList&lt;<strong>int[]</strong>> is <strong>allowed</strong>. </p>
  
  <p>I was under the impression that primitive data types are not allowed in Collections, so why is this legit?</p>