title: Changing the properties of an object from another object in JAVA
body: <p>Do i have to create an instance of an object to be able to modify it's properties?</p>
  
  <p>I have a window that have option on the color and speed of a ball. In the other window I have an animation of a bal going up and down. I want the window with the option to control properties such as color and speed of the ball. Can i do that without creating an instance of the ball object? I've created some setter in my ball class.</p>