title: What's the fastest Java collection for single threaded Contains(Point(x,y)) functionality?
body: <p>In my application I need to check a collection of 2D coordinates (x,y) to see if a given coordinate is in the collection,  it needs to be as fast as possible and it will only be accessed from one thread.
  ( It's for collision checking )</p>
  
  <p>Can someone give me a push in the right direction?</p>