Java

The objective of this assignment is to implement a simple menu driver program based on PhoneBookEntry program developed earlier. Declare a class Main that contains the main method and is the entry point to the program. PhoneBookEntries are stored in a CSV file that needs to be loaded at the beginning of the execution and saved at the end of the execution. The program should allow a case-insensitive search by any substring of first name, last name, or phone number (just like smartphones). The program should also allow for new entry to be added, and an existing entry to be deleted by entry number.

Here is what the menu will look like:

Phone Book

==========

1. Find an entry

2. Add a new entry

3. Remove an entry

4. Display all

5. Exit

Enter choice:

Hints:

1. How to read a CSV file?

There are two methods.

Method 1. Use delimiters in Scanner object to read one token at a time. Here is some sample code:

File phoneBookFile = new File("phonebook.csv"); Scanner inputFile = new Scanner(phoneBookFile); inputFile.useDelimiter("[, \t]+"); int i = 0; while(inputFile.hasNext()) {

String firstname = inputFile.next(); String lastname = inputFile.next(); String phoneNumber = inputFile.next(); System.out.println("Entry #" + ++i + ": first name: " + firstname + ", last name: " + lastname + ", phone number: " + phoneNumber);

}

inputFile.close();

Method 2. Read a full line and then split it into individual tokens as an array of Strings. Here is some sample code:

File phoneBookFile = new File("phonebook.csv");

Scanner inputFile = new Scanner(phoneBookFile);

int i = 0;

while(inputFile.hasNext()) {

String line = inputFile.nextLine();

String[] entry = line.split(",");

System.out.println("Entry #" + ++i + ": first name: " + entry[0] + ", last name: " + entry[1] + ", phone number: " + entry[2]);

}

inputFile.close();