Java Collection<Object> or Collection<?>
<p>I try use List instead of List </p>

<pre><code>List&lt;?&gt; list = new ArrayList&lt;Integer&gt;();
...
list.add(1); //compile error
</code></pre>

<p>What i do wrong and how cast new value to Integer? 
 Maybe i shoud use List in my project?</p>
