Task – 1Write a class named Cellphone. The class should contain:Three constants named SHORT, MEDIUM, and LONG with the values 10, 20, and 30 todenote the call duration.private data field: call_duration(double).• A public static field numberOfCalls(int) which should count the number of calls made.• A default constructor with no argument.• A constructor that creates Cellphone object with the specified data field.• Get and set methods for the data field.• A method named makeCall() that will make a call.A method named endCall() that will end a call.• A method called getCallDuration() that measures the duration of a call.a. Draw the UML diagram of Cellphone.b. Write the class Cellphone in Java.c. Write a test program that will create an array of x number of Cellphone objects and createeach of them by taking the call_duration from the user where, x = the 5th digit of your NSU ID.For example, if your ID is 1238765999, then x = 7. If the digit is 0 for your NSU ID, then use thenext digit. Later on, it should output the average call_duration from the array.

import java.util.*; public class Phone { protected String telecoms_provider; protected…

Write a class named Cellphone. The class should contain: Three constants named SHORT, MEDIUM, and LONG with the values 10, 20, and 30 to denote the call duration. private data field: call_duration(double). • A public static field numberOfCalls(int) which should count the number of calls made. • A default constructor with no argument. A constructor that creates Cellphone object with the specified data field. • Get and set methods for the data field. • A method named makeCall() that will make a call. • A method named endCall() that will end a call.

Write a class named Cellphone. The class should contain: Three constants named SHORT, MEDIUM, and LONG with the values 10, 20, and 30 to denote the call duration. private data field: call_duration(double). • A public static field numberOfCalls(int) which should count the number of calls made. • A default constructor with no argument. A constructor that creates Cellphone object with the specified data field. • Get and set methods for the data field. • A method named makeCall() that will make a call. • A method named endCall() that will end a call.

Database System Concepts

7th Edition

ISBN:9780078022159

Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Chapter1: Introduction

Section: Chapter Questions

Problem 1PE

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