accessing class instances in all classes <p>For a school assignment, I have created a program that add and searches for products, the adding and searching are performed in the class <code>EStoreSearch</code>, I've created 3 other classes to create GUI <code>JFrames</code>. My question is how do I allow the <code>JFrame</code> classes to access the same instance of the <code>EStoreSearch</code> class that stores the <code>ArrayList</code> data(which stores all the products) so that I can add and search for products in the GUI?</p>