Based on the class BC it y in the last question, write a new Java class named BSFCity for modeling "Better Smoke-Free" Cities with the following requirements.

a) This BSFCity class is a public subclass of the given class BCity.

- This class has a specific instance field of string type, named sFreeRu1e, representing a specific "Smoke-Free" rule governing the "Better Smoke-Free" city.

- It has one constructor with the same set of parameters as its direct superclass.

- The constructor body simply calls the corresponding constructor of its superclass properly.

b) It has 2 public methods:

• The first method setSFreeRu1e ( ) is for setting the specific field, the "Smoke-Free" rule.
  • The method accepts one input argument rule of string type and has no return.
  • This method body only sets the specific field with the input parameter value.
• The second method overrides the method of its direct superclass for displaying information.
  • The method body first calls the overridden method of the superclass.
  • The method finally displays an extra line to show the specific "Smoke-Free" rule, as sample program output below.

Sample Program Output

(Suppose the specific "Smoke-Free" rule string is: "LAW of SMOKEFREE ")

City: BSF City, Pop: 8

Rule 21

Rule 22

Smoke-Free Rule : LAW of SMOKE-FREE

c) This class includes the main method, the entry point for starting the program.

• This main method body first creates an array of City which contains 2 related city objects representing the given two cities listed in the table below.
• This main method then calls the related method to set the smoke-free city object in the array a specific "Smoke-Free" rule string with format: "LAW of "

E.g. "LAW of CHAN Tai Man" if your full name is CHAN Tai Man.

• This main method finally calls the related method to display the smoke-free city object in the array, as sample program output below.
• NO more than 9 statement lines are allowed in the main ( ) method body.

Given Two Cities

Index	Name	Population	Type	List of rules
0	"A City"	2	City
1	"BSF City"	8	BSFCITY	"Rule 21", "Rule 22"

Sample Program Output

Reference

Based on the given references above and the class City in the last question, define a new Java class BC i ty for modeling "Better" Cities with the following requirements.

1. This BCity class is a public subclass of the given class City o This class has a specific instance field named bRList (type ArrayList of string) representing the list of better rules (of string type) governing the better city.

o This field is initialized with an empty ArrayList of string.

2. It has one constructor with 3 parameters (String cN, int c P, String C ] rules) : o The first and second parameters are for the name and population of the city object, while the third parameter is for the rules.

• The body of this constructor first calls the corresponding constructor of its superclass with the two related input parameters.
• The constructor body then adds all elements of the input array parameter into its own specific field bRList.

c) It has 2 public methods:

• The method hasRu1e ( ) is for checking if the city includes a specific rule string.
• The method accepts one input argument rule of string type and returns int value.
• This method checks if the input argument rule appears in the field bRList and matches the string content of an element in the list bRLi st.
• The method returns the index number of the first matched element found in the list.

The method returns -1 if no element found in the list matches the input argument rule o The method dispRList ( ) is for displaying information of the object on console.

• The method has no input argument and no return value.
• The method body first displays the general information of the city, then displays all its rules (one rule in a line) as sample program output below.

Sample Program Output

(Suppose City has: name "B Ci ty", Population 4, Rules: "Rule 11 " and "Rule 12")

City: BSF City, Pop: 8 Rule 21 Rule 22 Smoke-Free Rule: LAW of CHAN Tai Man O * Given reference, useful methods for accessing Java class ArrayList: add (elt): Add element to the end of the list, e.g. arrList.add(elt) get (index): Get an element (with index) in list, e.g. arrList.get(0) size(): Size (total number of elements) of the list, e.g. arrList.size() O o