title: copy object not instantiating
body: <p>I'm trying to create a copy of my Board object but it doesn't seem to be instantiating. Can someone tell me why?</p>
  
  <pre><code>    class Board {
         private Board _copyBoard; 
         private int _size;
         public Board (int N) {
            _size = N;
         }
         public Board (Board b) {
              this._copyBoard = b;
         }
         int size() {
              return _size;
         }
      }
  </code></pre>
  
  <p>When I do:</p>
  
  <pre><code>    Board b = new Board(4);
      Board x = new Board(b);
      System.out.println(x.size()); --&gt; 0 instead of 4.
  </code></pre>