title: Best way to find the largest value in a Hashmap<Arraylist,Arraylist>
body: <p>I have a hashmap as show here;</p>
  
  <pre><code>HashMap&lt;ArrayList&lt;Integer&gt;,ArrayList&lt;String&gt;&gt;
  </code></pre>
  
  <p>I'd like to find the ArrayList with the greatest length() from the second ArrayList (the value)</p>
  
  <p>What is the most efficient way to do this?</p>