Question

I have created a hashmap in a singleton class, we will call it Class A. I have also created a TableModel class that extends AbstractTableModel, we will call it Class B. In Class C, I am wanting to use the values in my hashmap to populate a jtable.

My question is how do I get the hashmap to Class B?

Answer 1

Use Composition….

A a = A.getInstance(); // I am assuming getInstance() is the method to return the Singleton reference of class A.

a.myHash.getKey(); // Call any method you want….

B b = new B(); // As B is not singleton, we can use “new”

Now fill the table in B with the data in HashMap