title: how to add javaDoc to my Java code in a NetBeans based project?
body: <p>How can I add JavaDoc or  other document to netbeans ?<br>
  I try with this way :</p>
  
  <pre><code>Tools &gt;&gt; Java Platform &gt;&gt; JavaDoc Tab &gt;&gt; JavaDoc.zip (in my desktop) 
  </code></pre>
  
  <p>but in editor when I press <kbd>Ctrl</kbd>+<kbd>Space</kbd> in tooltiptext this message shown : </p>
  
  <blockquote>
    <p>Javadoc not found. Either Javadoc documentation for this item does not exist or you have not added specified Javadoc in the Java Platform Manager or the Library Manager.</p>
  </blockquote>
  
  <p>I tried restarting NetBeans but this was the result:</p>
  
  <p><img src="https://i.stack.imgur.com/fG6vi.jpg" alt="enter image description here"></p>