title: How to resolve build path errors?
body: <p>If I run my project this error will come build path problem how to solve this error. </p>
  
  <p>error:</p>
  
  <ol>
  <li>Description Resource Path Location
  Type Project 'videothumb' is missing
  required source      folder: 'gen'
  videothumb Build path Build Path
  Problem</li>
  <li>The project cannot be built until
  build path errors are resolved
  videothumb Unknown      Java Problem</li>
  </ol>
  
  <p>Can any one help me?</p>
  
  <p><img src="https://i.stack.imgur.com/mTD7p.png" alt="alt text"></p>