Description: Create (Java Program) a phonebook directory that will store the contact numbers of N persons. Your program should allow the user to add, view, delete, and update the contacts in the phonebook. Note that one person can have multiple contact numbers. The program will stop when the user command is ‘X’. Program command and entry should not be case-sensitive. That means commands ‘I’ or ‘i’ and the name “Jacky” or “JACKY” are the same. Each contact number can be 7 digits or 11 digits only. The user should input a string containing the command, name, and contact number(s) (Limit the contact number of each person to three). This string should be broken down into fields in order to separate the different values and store them in their appropriate variables. Use linked list in the implementation. Your node must declare at least four instance variables. Program flow: Command> I Jacky 09211234567 Remarks: New contact has been added. Command> V Jacky Contact Number(s): 09211234567 Command> I Jacky 09221234567 Remarks: New number has been added. Command> V Jacky Contact Number(s): 09211234567, 09221234567 Command> I Chan 09212233145 09199876543 Remarks: New contact has been added. Command> I Chan 09211234567 Remarks: New number has been added. Command> V Chan Contact Number(s): 09212233145, 09199876543, 09211234567 Command> V Phonebook directory: Chan - 09212233145, 09199876543, 09211234567 Jacky – 09211234567, 09221234567 Command> D Jacky Remarks: Jacky has been removed. Command> V Phonebook directory: Chan - 09212233145, 09199876543, 09211234567 Command> I Remarks: Invalid command. Command> D Remarks: Invalid command. Command> A Remarks: Invalid command. Command> M Chan John //This will change the name Chan to John Remarks: Chan has been modified. Command> M John 09212233145 09332233252 Remarks: John has been modified. Command> V John Contact Number(s): 09332233252, 09199876543, 09211234567 Command> D John Contact Number(s): 09332233252, 09199876543 Command> X Legend: I – means add a new contact or add a new number to existing contacts. D – means delete existing contact/number. Command D should always be followed by the contact's name or contact's name and number.. V – means view by contact(s). If command V is followed by a name, then view specific contact only. Otherwise, view all contacts in the directory and display them in ascending order according to their contact name. M – means modify specific contact. Users can change the name or contact number(s) of the said contact. X – means exit. **********Any other command is considered as invalid. **********

Description: Create (Java Program) a phonebook directory that will store the contact numbers of N persons. Your program should allow the user to add, view, delete, and update the contacts in the phonebook. Note that one person can have multiple contact numbers. The program will stop when the user command is ‘X’. Program command and entry should not be case-sensitive. That means commands ‘I’ or ‘i’ and the name “Jacky” or “JACKY” are the same. Each contact number can be 7 digits or 11 digits only. The user should input a string containing the command, name, and contact number(s) (Limit the contact number of each person to three). This string should be broken down into fields in order to separate the different values and store them in their appropriate variables. Use linked list in the implementation. Your node must declare at least four instance variables. Program flow: Command> I Jacky 09211234567 Remarks: New contact has been added. Command> V Jacky Contact Number(s): 09211234567 Command> I Jacky 09221234567 Remarks: New number has been added. Command> V Jacky Contact Number(s): 09211234567, 09221234567 Command> I Chan 09212233145 09199876543 Remarks: New contact has been added. Command> I Chan 09211234567 Remarks: New number has been added. Command> V Chan Contact Number(s): 09212233145, 09199876543, 09211234567 Command> V Phonebook directory: Chan - 09212233145, 09199876543, 09211234567 Jacky – 09211234567, 09221234567 Command> D Jacky Remarks: Jacky has been removed. Command> V Phonebook directory: Chan - 09212233145, 09199876543, 09211234567 Command> I Remarks: Invalid command. Command> D Remarks: Invalid command. Command> A Remarks: Invalid command. Command> M Chan John //This will change the name Chan to John Remarks: Chan has been modified. Command> M John 09212233145 09332233252 Remarks: John has been modified. Command> V John Contact Number(s): 09332233252, 09199876543, 09211234567 Command> D John Contact Number(s): 09332233252, 09199876543 Command> X Legend: I – means add a new contact or add a new number to existing contacts. D – means delete existing contact/number. Command D should always be followed by the contact's name or contact's name and number.. V – means view by contact(s). If command V is followed by a name, then view specific contact only. Otherwise, view all contacts in the directory and display them in ascending order according to their contact name. M – means modify specific contact. Users can change the name or contact number(s) of the said contact. X – means exit. Any other command is considered as invalid.

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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Program flow:

Command> I Jacky 09211234567

Remarks: New contact has been added.

Command> V Jacky Contact Number(s): 09211234567

Command> I Jacky 09221234567

Remarks: New number has been added.

Command> V Jacky

Contact Number(s): 09211234567, 09221234567

Command> I Chan 09212233145 09199876543

Remarks: New contact has been added.

Command> I Chan 09211234567

Remarks: New number has been added.

Command> V Chan

Contact Number(s): 09212233145, 09199876543, 09211234567

Command> V

Phonebook directory:

Chan - 09212233145, 09199876543, 09211234567

Jacky – 09211234567, 09221234567

Command> D

Jacky Remarks: Jacky has been removed.

Command> V

Phonebook directory:

Chan - 09212233145, 09199876543, 09211234567

Command> I

Remarks: Invalid command.

Command> D

Remarks: Invalid command.

Command> A

Remarks: Invalid command.

Command> M Chan John //This will change the name Chan to John

Remarks: Chan has been modified.

Command> M John 09212233145 09332233252

Remarks: John has been modified.

Command> V John

Contact Number(s): 09332233252, 09199876543, 09211234567

Command> D John

Contact Number(s): 09332233252, 09199876543

Command> X

Legend:
I – means add a new contact or add a new number to existing contacts.
D – means delete existing contact/number. Command D should always be followed by the contact's name or contact's name and number..
V – means view by contact(s). If command V is followed by a name, then view specific contact only. Otherwise, view all contacts in the directory and display them in ascending order according to their contact name.
M – means modify specific contact. Users can change the name or contact number(s) of the said contact.
X – means exit.
Any other command is considered as invalid.

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