title: cannot resolve java.util in Eclipse?
body: <p>Using Eclipse 4.5.2 and after import a Java project by others, it is said cannot import java.util? Using Mac OSX. I post the screen snapshot and output of command java, any check list in configurations to see what is wrong? Thanks.</p>
  
  <pre><code>/usr/bin/java -version
  java version "1.8.0_102"
  Java(TM) SE Runtime Environment (build 1.8.0_102-b14)
  Java HotSpot(TM) 64-Bit Server VM (build 25.102-b14, mixed mode)
  </code></pre>
  
  <p><a href="https://i.stack.imgur.com/mqRuu.png" rel="noreferrer"><img src="https://i.stack.imgur.com/mqRuu.png" alt="enter image description here"></a></p>
  
  <p><strong>Edit 1</strong>,</p>
  
  <p><a href="https://i.stack.imgur.com/xju1i.png" rel="noreferrer"><img src="https://i.stack.imgur.com/xju1i.png" alt="enter image description here"></a>
  <a href="https://i.stack.imgur.com/3I9Ga.png" rel="noreferrer"><img src="https://i.stack.imgur.com/3I9Ga.png" alt="enter image description here"></a></p>