title: what are the legacy classes in Java?
body: <p>I recently heard <code>Vector is a Legacy class</code>, then I read on a website that </p>
  
  <blockquote>
    <p>Legacy classes are used to save Objects before Collections came.</p>
  </blockquote>
  
  <p>So, why these are not called <code>Deprecated</code> classes, why <code>Legacy</code>?</p>