Question

Phonebook. You want to have a phone book that allows you to manipulate Contacts. A contact is made up of First Name, Last Name, Phone, Address, Birthday Date. (On java)

Options:

1. Set number of contacts to store
2. Enter contact
3. Show entered contacts
4. Sort by last name
5. Sort by birthday day
6. Exit

Answer 1

ScreenShot

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Program

/*This program is used to save details in phone book
* Here ask user for how many customer details you want to enter
* Enter that much customer details
* Then display details
* Sort by last name wise
* Sort by day of date of birth
*/
//Header file for I/o and datecheck
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.*;
//Phone book class
class PhoneBook{
   //Member variables
   String[] FirstName,LastName, Phone, Address, BirthdayDate;
   //Constructor set all arrays length 1
   PhoneBook(){
       FirstName=new String[1];
       LastName=new String[1];
       Phone=new String[1];
       Address=new String[1];
       BirthdayDate=new String[1];
   }
   //set array length user defined size
   public void setNumberOfContacts() {
       int n=0;
       Scanner in=new Scanner(System.in);
       System.out.println("Please enter how many contacts are you going to enter:");
       n=in.nextInt();
       FirstName=new String[n];
       LastName=new String[n];
       Phone=new String[n];
       Address=new String[n];
       BirthdayDate=new String[n];
   }
   //Enter contact details
   public void enterContacts() {
       String fName,lName,ph,addr,bDate;
       Scanner in=new Scanner(System.in);
       //Prompt user to enter details of contacts
       for(int i=0;i<FirstName.length;i++) {
           System.out.println("Please enter the first name:");
           fName=in.nextLine();
           System.out.println("Please enter the last name:");
           lName=in.nextLine();
           System.out.println("Please enter Phone number(10 digits):");
           ph=in.nextLine();
           //Check phone number length10 digits
           while(ph.length()!=10) {
               System.out.println("Please enter Phone number(10 digits):");
               ph=in.nextLine();
           }
           System.out.println("Please enter address(comma Seperated):");
           addr=in.nextLine();
           System.out.println("Please enter birth day(dd/mm/yyyy):");
           bDate=in.nextLine();
           //Date validation
           SimpleDateFormat sdfrmt = new SimpleDateFormat("dd/MM/yyyy");
            try
            {
                Date date = sdfrmt.parse(bDate);
             
            }
            catch (ParseException e)
            {
               System.out.println("Please enter birth day(dd/mm/yyyy):");
               bDate=in.nextLine();
             
            }
          
           //Set array with details
            FirstName[i]=fName;
           LastName[i]=lName;
           Phone[i]=ph;
           Address[i]=addr;
           BirthdayDate[i]=bDate;
       }
          
       }
   //Display contact details
   public void displayContacts() {
       System.out.println("FirstName          LastName          PhoneNumber         Address             BirthDayDate");
       System.out.println("******************************************************************************************\n");
       for(int i=0;i<FirstName.length;i++) {
           System.out.println(" "+FirstName[i]+"          "+LastName[i]+"            "+Phone[i]+"          "+Address[i]+"          "+BirthdayDate[i]);
       }
      
   }
   //Sort the array based on lastname  
   public void sortLastName() {
       int n =FirstName.length;
         for(int i=0; i < n; i++){
                 for(int j=1; j < (n-i); j++){
                          if(LastName[j-1].compareTo(LastName[j])>0){
                                 //swap elements
                                 String temp1 = LastName[j-1];
                                 String temp2 = FirstName[j-1];
                                 String temp3 = Phone[j-1];
                                 String temp4 = Address[j-1];
                                 String temp5 = BirthdayDate[j-1];
                                 LastName[j-1] =LastName[j];
                                 FirstName[j-1] =FirstName[j];
                                 Phone[j-1] =Phone[j];
                                 Address[j-1] =Address[j];
                                 BirthdayDate[j-1] =BirthdayDate[j];
                                 LastName[j] = temp1;
                                 FirstName[j] = temp2;
                                 Phone[j] = temp3;
                                 Address[j]=temp4;
                                 BirthdayDate[j]=temp5;
                         }
                        
                 }
         }
      
   }
   //Sort the array based on day
   public void sortBirthDay() {
       int n =FirstName.length;
       for(int i=0; i < n; i++){
           for(int j=1; j < (n-i); j++){
                   String day1=BirthdayDate[j-1].substring(0,2);
                   String day2=BirthdayDate[j].substring(0,2);
                          if(day1.compareTo(day2)>0){
                                 //swap elements
                                 String temp1 = LastName[j-1];
                                 String temp2 = FirstName[j-1];
                                 String temp3 = Phone[j-1];
                                 String temp4 = Address[j-1];
                                 String temp5 = BirthdayDate[j-1];
                                 LastName[j-1] =LastName[j];
                                 FirstName[j-1] =FirstName[j];
                                 Phone[j-1] =Phone[j];
                                 Address[j-1] =Address[j];
                                 BirthdayDate[j-1] =BirthdayDate[j];
                                 LastName[j] = temp1;
                                 FirstName[j] = temp2;
                                 Phone[j] = temp3;
                                 Address[j]=temp4;
                                 BirthdayDate[j]=temp5;
                       }
                        
                 }
         }
      
   }
}
//Test class(Main class)
public class PhoneBookTest {

   public static void main(String[] args) {
       //Object Creation
       PhoneBook pb=new PhoneBook();
       //Call member function of the class
       pb.setNumberOfContacts();
       pb.enterContacts();
       pb.displayContacts();
       pb.sortLastName();
       System.out.println("\n\nAfter Last Name based Sort:");
       pb.displayContacts();
       pb.sortBirthDay();
       System.out.println("\n\nAfter Day based Sort:");
       pb.displayContacts();

   }

}

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Output

Please enter how many contacts are you going to enter:
2
Please enter the first name:
Mahesh
Please enter the last name:
Tripadi
Please enter Phone number(10 digits):
9845756112
Please enter address(comma Seperated):
13,Hazar Street,Badhi
Please enter birth day(dd/mm/yyyy):
15/05/1996
Please enter the first name:
Milli
Please enter the last name:
Madav
Please enter Phone number(10 digits):
8954782514
Please enter address(comma Seperated):
13,Hazar Street,Badhi
Please enter birth day(dd/mm/yyyy):
04/11/1983
FirstName          LastName          PhoneNumber         Address             BirthDayDate
******************************************************************************************

Mahesh          Tripadi            9845756112          13,Hazar Street,Badhi          15/05/1996
Milli          Madav            8954782514          13,Hazar Street,Badhi          04/11/1983

After Last Name based Sort:
FirstName          LastName          PhoneNumber         Address             BirthDayDate
******************************************************************************************

Milli          Madav            8954782514          13,Hazar Street,Badhi          04/11/1983
Mahesh          Tripadi            9845756112          13,Hazar Street,Badhi          15/05/1996

After Day based Sort:
FirstName          LastName          PhoneNumber         Address             BirthDayDate
******************************************************************************************

Milli          Madav            8954782514          13,Hazar Street,Badhi          04/11/1983
Mahesh          Tripadi            9845756112          13,Hazar Street,Badhi          15/05/1996