Thread: If no search results found..display a message....but how? is the question.

Hey guys,

First time poster so quick background on my project. I've been asked to make a program that accesses a file and outputs what you've searched for. The file contains a list of the worlds capitols and their population. If you enter "North" it will spit out anything with that word in it, obviously. Problem is if there is no search result it does nothing...I want it to be able to display a message saying "Sorry, no results were found" but don't know where to start apart from the fact I know it would be a boolean varibale and an if statement in the end..guidance would be greatly appreciated

Code was written in Bluej
Source:

import java.util.Scanner;
import java.io.File;
import java.io.FileNotFoundException;
 
 
public class Capitals
{
    public static void main(String[] args) throws FileNotFoundException
    {
        // ask the user for the search string
        Scanner keyboard = new Scanner(System.in);
        System.out.print("Please enter part of the country name: ");
        String searchString = keyboard.next().trim().toLowerCase();
 
        // open the data file
        File countryFile = new File("CountryData.csv");
 
        // create a scanner from the file
        Scanner countryInput = new Scanner(countryFile);
 
        // set up the scanner to use "," as the delimiter
        countryInput.useDelimiter("[\\r,]");
 
        // read one line of data at a time, processing each line
        while(countryInput.hasNext())
        {
            // read the 3 parts of the line
 
            // first the country and capital
            String country = countryInput.next();
            String capital = countryInput.next(); 
 
            // then the population info
            int population = countryInput.nextInt();
 
            // print out the info if the country name contains the input search string
            if(country.toLowerCase().contains(searchString))
            {
                System.out.println(country + "\t" +
                    capital + "\t" + population);
            }
        }
 
        // be polite and close the file
        countryInput.close();
    }
}

__________________________________________________ __________________________________

Thank you in advance

I tried doing this:

if(country.toLowerCase().contains(searchString))
            {
                System.out.println(country + "\t" +
                    capital + "\t" + population);
 
            }
            else
            {     System.out.println("Sorry, no results were found");
 
            }

But then it just posts "Sorry, no results were found" regardless of what I put in. Also it posts repeatedly...I'm guessing its looping infinitely?

How would I set it's value in the loop?? - That's what confuses me.

I've set:

boolean resultFound

I'm guessing the next step would be to put this inside the loop:

resultFound= something

and then at the end:

if(!resultFound)
       {
            System.out.println("Sorry, no results were found.");
 
        }

I haven't compiled yet..still trying to figure out how to work it into the loop haha