Question

Java need help with searching for a contact

Question:Write a program that uses an ArrayList of parameter type Contact to store a database of contacts. The Contact class should store the contact’s first and last
name, phone number, and email address. Add appropriate accessor and mutator methods. Your database program should present a menu that allows the user to add a contact, display all contacts, search for a specific contact and display it, or search for a specific contact and give the user the option to delete it. The searches should find any contact where any instance variable contains a target search string. For example, if “elmore” is the search target, then any contact where the first name, last name, phone number, or email address contains “elmore” should be returned for display or deletion. Use the “for-each” loop to iterate through the ArrayList.

Contact.java

import java.util.Scanner;

public class Contact
{
   private String fname;
   private String lname;
   private String phonenum;
   private String email;

   public Contact()
   {
       fname=" ";
       lname=" ";
       phonenum=" ";
       email=" ";
   }

   public Contact(String fn,String ln,String p,String e)
   {
       this.fname=fn;
       this.lname=ln;
       this.phonenum=p;
       this.email=e;
   }

   public void setfName(String fn)
   {
       this.fname=fn;
   }

   public void setlName(String ln)
   {
       this.lname=ln;
   }

   public void setNumber(String p)
   {
       this.phonenum=p;
   }

   public void setEmail(String e)
   {
       this.email=e;
   }

   public String getfName()
   {
       return lname;
   }

   public String getlName()
   {
       return lname;
   }

   public String getNumber()
   {
       return phonenum;
   }

   public String getEmail()
   {
       return email;
   }

   public String toString()
   {
       return "Name: "+fname+" "+lname+"\nPhone Number: "+phonenum+"\nEmail: "+email;
   }
}

ContactList.java

import java.util.Scanner;
import java.util.List;
import java.util.ArrayList;

public class ContactList
{
private List<Contact> info=null;

public ContactList()
{
info = new ArrayList<Contact>();
}
public int addContact(Contact contact)
{
Contact n=findName(contact.getfName()+contact.getlName()+contact.getNumber()+contact.getEmail());

if(n==null)
{
info.add(contact);
return 1;
}
return -1;
}
public Contact findName(String s)
{
for (Contact c : info)
{
if (c.getfName().equalsIgnoreCase(s)&c.getfName().equalsIgnoreCase(s))
{
return c;
}
}   
return null;
}
}

ContactListDemo.java

import java.util.Scanner;

public class ContactListDemo
{
   public static void main(String[] args)
   {
       Scanner input = new Scanner(System.in);

       ContactList book = new ContactList();

       Contact c1=new Contact();

       c1.setfName("Andy");
       c1.setlName("Williams");
       c1.setNumber("585-279-0095");
       c1.setEmail("aWilliams@aol.com");

       book.addContact(c1);

       Contact c2=new Contact("Dean","Martin","616-223-3483","dean.martin@yahoo.com");

       book.addContact(c2);
  
       String choice = "";

       while (!choice.equalsIgnoreCase("done"))
       {
           System.out.println("\nWould you like to add or search for a contact from the phone book?\nIf you would like find a contact type \"search\" or if you would like to add a contact type \"add\" and if you are finished type \"done\" to end.");
           System.out.println("");

           choice = input.nextLine();

           if (choice.equalsIgnoreCase("search"))
           {
               System.out.print("Enter the the first or last name: ");
               String search = input.nextLine();

               Contact result = book.findName(search);

               if (result != null)
               {
                   System.out.println("\nThe name was found.\nHere is the contact information:");
                   System.out.println(result);
               }

               else
               {
               System.out.println("\nThe name couldn't be found.");
               }
           }
           if (choice.equalsIgnoreCase("add"))
           {
               ContactList bookNew = new ContactList();

               System.out.print("Enter the first name: ");
               String fname = input.nextLine();

               System.out.print("Enter the last name: ");
               String lname = input.nextLine();

               System.out.print("Enter the phone number: ");
               String num = input.nextLine();

               System.out.print("Enter the email: ");
               String email = input.nextLine();

               Contact newC = new Contact(fname,lname,num,email);

               bookNew.addContact(newC);

               System.out.println("\n\nThis is the contact you added:\n"+newC);
           }
       }
   }
}

Issue:

when i go to search for it it says it cant be found

everything compiles without errors but when i run it and i can add a a contact just the search isnt working

Answer 1

If you have any doubts, please give me comment...

import java.util.Scanner;

public class Contact {

    private String fname;

    private String lname;

    private String phonenum;

    private String email;

    public Contact() {

        fname = " ";

        lname = " ";

        phonenum = " ";

        email = " ";

    }

    public Contact(String fn, String ln, String p, String e) {

        this.fname = fn;

        this.lname = ln;

        this.phonenum = p;

        this.email = e;

    }

    public void setfName(String fn) {

        this.fname = fn;

    }

    public void setlName(String ln) {

        this.lname = ln;

    }

    public void setNumber(String p) {

        this.phonenum = p;

    }

    public void setEmail(String e) {

        this.email = e;

    }

    public String getfName() {

       return fname;

    }

    public String getlName() {

        return lname;

    }

    public String getNumber() {

        return phonenum;

    }

    public String getEmail() {

        return email;

    }

    public String toString() {

        return "Name: " + fname + " " + lname + "\nPhone Number: " + phonenum + "\nEmail: " + email;

    }

}

ContactList.java

import java.util.Scanner;

import java.util.List;

import java.util.ArrayList;

public class ContactList {

    private List<Contact> info = null;

    public ContactList() {

        info = new ArrayList<Contact>();

    }

    public int addContact(Contact contact) {

        Contact n = findName(contact.getfName() + contact.getlName() + contact.getNumber() + contact.getEmail());

        if (n == null) {

            info.add(contact);

            return 1;

        }

        return -1;

    }

    public Contact findName(String s) {

        for (Contact c : info) {

           if (c.getfName().equalsIgnoreCase(s) || c.getlName().equalsIgnoreCase(s)) {

               return c;

            }

        }

        return null;

    }

}

ContactListDemo.java

import java.util.Scanner;

public class ContactListDemo {

    public static void main(String[] args) {

        Scanner input = new Scanner(System.in);

        ContactList book = new ContactList();

        Contact c1 = new Contact();

        c1.setfName("Andy");

        c1.setlName("Williams");

        c1.setNumber("585-279-0095");

        c1.setEmail("aWilliams@aol.com");

        book.addContact(c1);

        Contact c2 = new Contact("Dean", "Martin", "616-223-3483", "dean.martin@yahoo.com");

        book.addContact(c2);

        String choice = "";

        while (!choice.equalsIgnoreCase("done")) {

            System.out.println(

                    "\nWould you like to add or search for a contact from the phone book?\nIf you would like find a contact type \"search\" or if you would like to add a contact type \"add\" and if you are finished type \"done\" to end.");

            System.out.println("");

            choice = input.nextLine();

            if (choice.equalsIgnoreCase("search")) {

                System.out.print("Enter the the first or last name: ");

                String search = input.nextLine();

                Contact result = book.findName(search);

                if (result != null) {

                    System.out.println("\nThe name was found.\nHere is the contact information:");

                    System.out.println(result);

                } else {

                    System.out.println("\nThe name couldn't be found.");

                }

            }

            if (choice.equalsIgnoreCase("add")) {

                ContactList bookNew = new ContactList();

                System.out.print("Enter the first name: ");

                String fname = input.nextLine();

                System.out.print("Enter the last name: ");

                String lname = input.nextLine();

                System.out.print("Enter the phone number: ");

                String num = input.nextLine();

                System.out.print("Enter the email: ");

                String email = input.nextLine();

                Contact newC = new Contact(fname, lname, num, email);

                bookNew.addContact(newC);

                System.out.println("\n\nThis is the contact you added:\n" + newC);

            }

        }

    }

}