Spring 5 Design Patterns

Sample implementation of the Composite design pattern

In the following example, I am implementing an Account interface, which can be either a SavingAccount and CurrentAccount or a composition of several accounts. I have a CompositeBankAccount class, which acts as a composite pattern actor class. Let's look at the following code for this example.

Create an Account interface that will be treated as a component:

    public interface Account { 
      void accountType(); 
    } 

Create a SavingAccount class and CurrentAccount class as an implementation of the component and that will also be treated as a leaf:

Following is the SavingAccount.java file:

 public class SavingAccount implements Account{ @Override public void accountType() { System.out.println("SAVING ...