title: What is the dynamic type of this object?
body: <p>I am JAVA beginner. I am confused about this code</p>
  
  <pre class="lang-java prettyprint-override"><code>Map&lt;Integer, Map&lt;String, Integer&gt;&gt; map = new HashMap&lt;&gt;();
  </code></pre>
  
  <p>This is a map of map, and I know the outer map is a hashmap, but what is the type of the inner map?</p>