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Thread: Boolean help

  1. #1
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    Default Boolean help

    I need to use a boolean variable to keep track of whether any countries were found, and then check this with an “if”
    statement at the end within this code.

    import java.io.*;
    import java.util.Scanner;
     
    /**
     * Write a description of class capital here.
     * 
     * @author (your name) 
     * @version (a version number or a date)
     */
    public class capital
    {
        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();
     
        }
    }

    I am not looking for advice. Im looking for a solution because I am very stuck. I know if I put an else statement under this part of the code
    {
    System.out.println(country + "\t" +
    capital + "\t" + population);
    }
    it puts the text I want, but repeats it. So it kinda did what i want. Other than that, im completely stuck. So no asking me to check my code and stuff, just a solution in code form

    thankyou


  2. #2
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    Default Re: Boolean help

    Check for the country first in the file, once it found, assign the values for country, capital and population from that line, then make the display out of the loop

  3. #3
    Super Moderator Norm's Avatar
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    Default Re: Boolean help

    Can you post the program's output and add some comments to the post describing what is wrong with it and showing what you want it to look like.
    If you don't understand my answer, don't ignore it, ask a question.

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