title: How do i sort keys in reverse order in java List<Integer>
body: <p>I get keys in ascending order when I am executing this code</p>
  <pre><code>List&lt;Integer&gt; sortedKey = groupedData.keySet().stream().sorted().collect(Collectors.toList());
  </code></pre>
  <p>How do I get them in descending order?</p>