title: How can I put key with null value in net.sf.json.JSONObject?
body: <p>I am using <b>net.sf.json.JSONObject</b>. It will remove <code><b>key</b></code> if my value is <b>null</b> while I am trying to put data in Json object using <a href="http://json-lib.sourceforge.net/apidocs/jdk15/net/sf/json/JSONObject.html#put%28java.lang.Object,%20java.lang.Object%29" rel="nofollow">put</a> method. </p>
  
  <p>Is there any way to keep my <b>key</b> as it is in my object even my value is null?</p>
  
  <p>for ex.</p>
  
  <p><code>
  <pre> JSONObject json = new JSONObject();
   json.put("myKey",null);
  </pre></code></p>
  
  <p>Then my output is : <code>{}</code></p>
  
  <p>But I want</p>
  
  <p>output : <code>{"myKey",""}</code></p>
  
  <p>How can I do?</p>