Please write code that follows the UML in java.

You will be implementing the Observer Pattern to create a scenario with watchman and city folk.

Subject:

Our subject is the watchman. They are hanging out at the watch tower. When they see trouble coming they play the trumpet. One trumpet call is a moderate warning, two calls is a sever warning. Before notifying the observers they display one of the following messages.

"WARNING: 1 trumpet was played!"

"WARNING: 2 trumpets were played!"

Observers:

Our observers are the town folk. We have a Teacher, a Shop Owner, and a Knight. When the watchman issue trumpet calls, they are going to act based on how many calls they hear. They will display the corresponding messages.

Teacher:

1 Trumpet Call: "Teacher: Helps get every kid home safe"

2 Trumpet Calls: "Teacher: Brings all students to the underground shelter"

Shop Owner:

1 Trumpet Call: "Shop Owner: Close down shop and head home"

2 Trumpet Calls: "Shop Owner: Drops everything and find nearest hideout"

Knight:

1 Trumpet Call: "Knight: Helps everyone get home safe"

2 Trumpet Calls: "Knight: Prepares for battle"

DRIVER:

package observer;

public class TownDriver { public static void main(String[] args) { System.out.println("A Happy Little City");

Watchman watchman = new Watchman(); Observer fredrick = new ShopOwner(watchman); Observer lillian = new Teacher(watchman); Observer monte = new Knight(watchman);

System.out.println(" ----------------------- ");

watchman.issueWarning(1);

System.out.println(" ----------------------- ");

watchman.issueWarning(2); } }

OUTPUT EXAMPLE:

A Happy Little City

-----------------------

WARNING: 1 trumpet was played! Shop Owner: Close down shop and head home Teacher: Helps get every kid home safe Knight: Helps everyone get home safe

-----------------------

WARNING: 2 trumpets were played! Shop Owner: Drops everything and find nearest hideout Teacher: Brings all students to the underground shelter Knight: Prepares for battle