title: The expression of type x is boxed into X?
body: <p>I'm a little confused by a warning that my Eclipse IDE is currently writing next to every expression where types are autoboxed or autounboxed:</p>
  
  <pre><code>The expression of type x is boxed into X
  
  The expression of type X is unboxed into x
  </code></pre>
  
  <p>Is this a warning I should react on? I thought autoboxing was a Java language feature - but now I seem to get warnings everytime this feature is used.</p>