title: Issue comparing doubles
body: <p>This simple if-comparison is not working, and i'm not sure why.</p>
  
  <p>Code:</p>
  
  <pre><code>public abstract class Button extends Drawable_object {
  ...
  
  @Override
  public void update()
  {
      super.update();
      mouseOver_last = mouseOver;
  
      double mx = Game_logic.get_mouse_x();
      double my = Game_logic.get_mouse_y();
  
      //the not working statement check:
      if ((mx &lt;= x + ((double)width / 2))&amp;&amp;
         (mx &gt;= x  - ((double)width / 2))&amp;&amp;
         (my &gt;= y  - ((double)height / 2))&amp;&amp;
         (my &lt;= y  + ((double)height / 2)))
      { mouseOver = true;}
      else mouseOver = false;
      ....
      }
  </code></pre>
  
  <p>Whilst Game_logic.get_mouse_x() and y are static methods:</p>
  
  <pre><code>public class Game_logic {
  ...
  
  public static double get_mouse_x() { return mouse_x; }
  public static double get_mouse_y() { return mouse_y; }
  }
  </code></pre>
  
  <p>And those are set by Mouse adapaer in my main run class:</p>
  
  <pre><code> public Board() throws IOException, URISyntaxException {
   ...
  
   private class MAdapter2 extends MouseAdapter {
      @Override
      public void mouseMoved(MouseEvent e) {
          Game_logic.set_mouse_x(e.getX());
          Game_logic.set_mouse_y(e.getY());
      }
  
  }
  </code></pre>
  
  <p>The thing is, when I draw on screen x - width / 2, mx and x + width / 2 (same with y), holding mouse at my desired position looks like statement must be true, but <code>mouseOver</code> is still false. How do i fix that?</p>