title: How to make a new list with a property of an object which is in another list
body: <p>Imagine that I have a list of certain objects:</p>
  
  <pre><code>List&lt;Student&gt;
  </code></pre>
  
  <p>And I need to generate another list including the <code>ids</code> of <code>Students</code> in the above list: </p>
  
  <pre><code>List&lt;Integer&gt;
  </code></pre>
  
  <p>Avoiding using a loop, is it possible to achieve this by using <strong>apache collections</strong> or <strong>guava</strong>? </p>
  
  <p><strong><em>Which methods should be useful for my case?</em></strong> </p>