title: android-java: check boolean value checking for null
body: <p>I am trying for null check  like below  </p>
  
  <pre><code>if (isTrue == null)
  </code></pre>
  
  <p>compile error says : "The operator == is undefined for the argument type(s) boolean"</p>
  
  <p>Please help, how to do null check.</p>
  
  <p>Thanks </p>