title: treemap sorting sequence with key and value
body: <p>My code as below and the output for treeMapMem as below :-</p>
  
  <pre><code>key value
  1   a
  10  b
  2   c
  3   d
  
  for(Map.Entry&lt;String,String&gt; entry : treeMapMem.entrySet()) {
  String value = entry.getValue();
  myMenulistSeqMem.add(value);
  }
  </code></pre>
  
  <p>My problem like this the sorting sequence is fine from 1,2,3 but 10 appear after 1.</p>