Change Mouse Cursor In Java

I decided to change the mouse cursor based on the theme of the game. This is the code that I wrote for the declaration of the cursor:

ImageIcon imageIcon = new ImageIcon ("cursor / cursor.gif");
Image img = imageIcon.getImage ();
Toolkit t = Toolkit.getDefaultToolkit ();
Cursor cursor = t.createCustomCursor (img, new Point (0,0), "cur");
this.setCursor (cursor);

Having to click on different JButton in the menu of the game, a few screens later, I have to manage something in particular, such as determining the point of clicks that allows the action to take place?

In particular I would like to change the point of hotspots. The size of 136x163 is cursor.gif

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As you can see in the image I want to create the point of hotspots in the red dot of the image. How should I do to pass the correct coordinates in Point?