title: Minus operation in java 8 for subtracting Lists
body: <p>Suppose I have two lists:</p>
  
  <pre><code>List&lt;Integer&gt; list1 =  Arrays.asList(1, 2, 3);
  List&lt;Integer&gt; list2 =  Arrays.asList(1, 2, 4, 5);
  </code></pre>
  
  <p>Now I want to perform <code>(list1 - list2)</code>. The expected ouptut is <code>{3}</code>. How to do this using java 8 streams?</p>