Create a Java interface file for an interface called MessageSender. And one more Java interface called Mammoth.

$($a$)$ With the correct project selected, in the File menu select New File...

$($b$)$ Under Categories: make sure that Java is selected.

$($c$)$ Under File Types: make sure that Java Interface is selected.

$($d$)$ Click Next.

$($e$)$ For Class Name: type MessageSender.

$($f$)$ For Package: select or type csci$2011.$lab$4.$

$($g$)$ Click Finish.

$($h$)$ A text editor window should pop up with the following source code $($except

with your actual name$)$:

package csci$2011.$Lab$4$;

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$$

Dept. CSIT, APSU Spring $2024$

$/**$

$*$

$*$ @author Kriti Chauhan

$*/$

public interface MessageSender $\{$

$\}$

$6.$ Add method headers to the MessageSender interface.

$($a$)$ Add a method header for a void return method called sendMessage that takes

two arguments of type String, one for recipient, and one for message.

$($b$)$ Add a method header for a void return method called receiveMessage that

takes two String arguments, one for sender and one for message.

$7.$ Create a Java class file for an abstract class called

AbstractCommunicationDevice that implements the MessageSender

interface.

a$)$ Add an instance variable deviceName to represent the name of the

communication device.

b$)$ Provide a constructor to initialize the deviceName variable in the abstract class

called AbstractCommunicationDevice.

c$)$ Implement methods declared in the MessageSender interface. A possible

implementation would be to print out information to the console.

$8.$ Create another abstract Java class called Smartphone that extends

AbstractCommunicationDevice.

a$)$ Declare an instance variable batteryLevel to represent the battery level of

the smartphone.

b$)$ Implement a method checkBatteryLevel$()$ to display the current battery level.

$9.$ Create a Java class file for the concrete class AndroidPhone that extends

Smartphone. It should also implement the interface Mammoth.

$($a$)$ Implement a parameterized constructor that initializes the device name and

battery level of the Android phone.

$($b$)$ Override the sendMessage$($String recipient, String message$)$

method to display a message specific to sending messages from an Android

phone.

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Dept. CSIT, APSU Spring $2024$

$($c$)$ Override the receiveMessage$($String sender$,$ String message$)$

method to display a message specific to receiving messages on an Android

phone.

$10.$ Add code in the main$()$ method of main class file to test your implementation.

a$)$ Create an instance of the AndroidPhone class.

b$)$ Send and receive messages using the Android phone.

c$)$ Display the battery level of the smartphone.

d$)$ Your output might look like this:

Samsung Galaxy is sending a message to Alice: Lunch today at $12.$

Samsung Galaxy received a message from Bob: What time is the

meeting today?

Samsung Galaxy is sending a message to Bob: Meeting at $2$:$30$

Battery level: $80\%$

$11.$ Ensure that your code follows good coding practices, including appropriate naming

conventions, comments, and indentation.

$12.$ Hand in all your source files to the D$2$L assignment dropbox called Lab $4.$ The

comments in each file should contain your name, CSCI $2011$ Lab $4,$ and a description of

what the class defined in the file does