title: how to make sql developer display non-English character correctly instread of displaying squares?
body: <p>in sql developer--preference</p>
  
  <p>Environment--encoding is already set to 'UTF-8'</p>
  
  <p>Code Editor--fonts was set to 'Verdana'</p>
  
  <p>Database--NLS--Language was set to 'American'</p>
  
  <p>The data in db was written by Java in UTF-8 encoding (95% percent sure）</p>
  
  <p>What else I need to do to make it displayed correctly? </p>
  
  <p>Note: the squares characters are actually Chinese characters.</p>
  
  <p><a href="https://i.stack.imgur.com/BQKtY.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/BQKtY.png" alt="enter image description here"></a></p>