Hands-On Design Patterns with Java

Programming the design pattern

Our program begins with a KitchenStaff interface that contains an empty getDetails() method:

public interface KitchenStaff {    public String getDetails();}

The Chef class, shown here, implements the KitchenStaff class. It contains three class variables and a constructor:

import java.util.ArrayList;import java.util.List;public class Chef implements KitchenStaff {    private String name;    private String role;    private List<KitchenStaff> staffList;    Chef(String name, String role) {        this.name = name;        this.role = role;        staffList = new ArrayList<KitchenStaff>();    }

The next section of the Chef class contains three methods—add(), fire(), and getStaffList():

public void add(Chef chef) {    staffList.add(chef);}public void fire(Chef ...