title: How to generate java docs for specific classes and specific packages, together
body: <p>I have to generate java docs for a project but not for all files.</p>
  
  <p>I want to create index.hmtl which contains java docs for some specific classes and some specific packages.</p>
  
  <p>I know how to create each of them separately but if i give two commands the last command results are shown and everything else is over written.</p>
  
  <p>How to i do all of this using one command. Basically i want to club it all in one.</p>
  
  <p>Thanks.</p>