Question

I have no idea if I’m coding this efficiently, or even correctly, but I want to input a name, address, and phone number. I then want to have input find a match from the input array, and use that same index number to print the corresponding information.

import java.util.*;

public class NameAddress {

    public static void main(String[] args) {

        Scanner ui = new Scanner(System.in);
        System.out.println("Welcome to the name collecting database");
        String []names = new String[5];
        String []address = new String[5];
        String []phone = new String [5];
        int count =0;

        while (count<=5)
        {
            System.out.println("Please enter the name you would like to input");
            names[count] =ui.next();
            System.out.println("Name has been registered into Slot "+(count+1)+" :"+Arrays.toString(names));
            System.out.println("Please enter the address corresponding with this name");
            ui.nextLine();
            address[count] = ui.nextLine();
            System.out.println(names[count]+" has inputted the address: "+address[count]+"\nPlease input your phone number");
            phone[count]=ui.nextLine();
            System.out.println(names[count]+"'s phone number is: "+phone[count]+"\nWould you like to add a new user? (Yes or No)");

            if (ui.next().equals("No"))
            {
                System.out.println("Please enter a name to see matched information");
                String name = ui.next();
                if(name.equals(names[count]))
                {
                    System.out.println("Name: "+names[count]+"\nAddress: "+address[count]+"\nPhone: "+phone[count]);
                }
                count=6;
            }
            count++;
        } 
    }

}

Answer 1

if(name.equals(names[count])) will work only if the name user is searching is at the current index of names. So you have to check every item in the array to determine whether it exists in the array. You can do this:

int itemIndex = Arrays.asList(names).indexOf(name);
if(itemIndex>=0) // instead of if(name.equals(names[count]))
{
    // rest of the codes; use the itemIndex to retrieve other information
}
else
{
    System.out.println(name + " was not found");
}

Or manually loop over the names array as others showed.