title: Gradle not found dependency
body: <p>There is no commons-lang.jar in External Libraries and i can't use StringUtils in my program. what i missing?</p>
  
  <p>gradle version: 2.4</p>
  
  <p><a href="https://i.stack.imgur.com/sbbkg.jpg" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/sbbkg.jpg" alt="enter image description here"></a></p>