CODEWITHSUNDEEP
javajava.util.scannerstockcannot-find-symbol
Christian Mcdermott
Christian Mcdermott

Reputation: 5

Getting "cannot find symbol" error in Java

I am writing some code to read static stock numbers from a text pad. I ran it to see what was wrong and I cannot seem to fix this cannot find symbol error.

import java.io.*;
import java.util.*;

public class StockMarket
{
    public static void main(String[] args) throws IOException
    {

        Scanner keyboard = new Scanner(System.in);

        System.out.println("Enter the filename: ");
        String filename = keyboard.nextLine();

        File file = new File(filename);
        Scanner inputFile = new Scanner(file);

        while (inputFile.hasNext())
        {
            checkValidity();
        }

        inputFile.close();

    }

    public static boolean checkValidity()
    {

    String line = inputFile.nextLine();
    double numberOfShares = inputFile.nextDouble();
    double buyPricePerShare = inputFile.nextDouble();
    double buyComissionRate = inputFile.nextDouble();
    double sellPricePerShare = inputFile.nextDouble();
    double sellComissionRate = inputFile.nextDouble();

    }

}

Upvotes: 0

Views: 1741

Answers (2)

Vasu
Vasu

Reputation: 22442

You have got few issues with your checkValidity() method as explained below:

(1) Your Scanner object scope exists only inside main method, so pass that object to checkValidity method

(2) Validate the inputs inside checkValidity method

(3) Your checkValidity method has got return type of boolean, so you need to return a boolean value from it i.e., if validation is successful, return true or if validation fails, return false

You refer the below code with inline comments:

public static boolean checkValidity(Scanner inputFile) {
        String line = inputFile.nextLine();
        double numberOfShares = inputFile.nextDouble();
        double buyPricePerShare = inputFile.nextDouble();
        double buyComissionRate = inputFile.nextDouble();
        double sellPricePerShare = inputFile.nextDouble();
        double sellComissionRate = inputFile.nextDouble();
        boolean validationSuccess = false;
        //validate your inputs
        // If validations are successful  then set validationSuccess = true;
        return validationSuccess;//return boolean
    }

Also, pass the scanner object from main() as shown below:

while (inputFile.hasNext()) {
     checkValidity(inputFile);//pass scanner object
}

Upvotes: 2

Markus
Markus

Reputation: 1171

Your method checkValidity cannot work. You try to access to variable inputFile which is not known in the method. You have to pass is as parameter.

public static boolean checkValidity(Scanner inputFile)

{

String line = inputFile.nextLine();
double numberOfShares = inputFile.nextDouble();
double buyPricePerShare = inputFile.nextDouble();
double buyComissionRate = inputFile.nextDouble();
double sellPricePerShare = inputFile.nextDouble();
double sellComissionRate = inputFile.nextDouble();

}

Upvotes: 0

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