title: Is there an indexable sorted list in the Java.util package?
body: <p>I'm looking for a data structure in the java.util package. I need it to meet the following requirements:</p>
  
  <ul>
  <li>The number of elements is (theoretically) unbounded.</li>
  <li>The elements are sorted in an ascending order.</li>
  <li>You can get the nth element (fast).</li>
  <li>You can remove the nth element (fast).</li>
  </ul>
  
  <p>I expected to find an indexable skip list, but I didn't. Do they have any data structure which meets the requirements I'v stated? </p>