Question

Create a program that keeps track of the following information input by the user: First Name, Last Name, Phone Number, Age Now - let's store this in a multidimensional array that will hold 10 of these contacts. So our multidimensional array will need to be 10 rows and 4 columns. You should be able to add, display and remove contacts in the array. In Java

Answer 1

Arrays can contain only one type of data so contact cannot be stored in array because fname is string and age is int . Better is to create contact class and store contacts in 1d array like this

import java.util.*;

class Contact
{
String fname, lname;
int pno, age;



Contact(String f, String l, int p, int a)
{
fname= f;
lname=l;
pno = p;
age=a;
  
}
public String toString()
{
return fname+" "+lname+" "+pno+" "+age;
}

}
public class ContactDemo
{

static void removeContact(Contact contacts[], Contact c )
{
for(int i=0; i<contacts.length;i++)
{
if(contacts[i].equals(c))
{
contacts[i]=null;
break;
}
}
}
static void displayContacts(Contact c[])
{
for(int i=0; i<c.length;i++)
{
if(c[i]!=null)
{
System.out.println(c[i]);
}
}
}

public static void main(String a[])
{


Contact[] contacts = new Contact[10];
contacts[0]=new Contact("Asif","Khan",986788998,20);
contacts[1]=new Contact("Iqbal","Khan",986788998,20);
contacts[2]=new Contact("Junaid","Khan",986788998,20);
contacts[3]=new Contact("Naseer","Khan",986788998,20);
  
removeContact(contacts, contacts[2]);
  
  
displayContacts(contacts);
  
}

}