title: Java Class Long - method longValue()
body: <p>Why has the java class Long a method longValue()? And what is the use of that? The java doc says</p>
  
  <pre><code>the numeric value represented by this object after conversion to type long.
  </code></pre>
  
  <p>Is there a case where I need this? Could the following first code code differ from the second for any long value?</p>
  
  <pre><code>//Is there a value where this myLong value contains other...
  Long l = new Long("...");
  long myLong = l;
  
  //...than this one?
  Long l = new Long("...");
  long myLong = l.longValue();
  </code></pre>