Question

I am very new at java and my be missing something very basic. When i run my code i am trying to add value to accounts created in the code. When i try to run the code i recieve an error that a file cannot be found, but i thought that the file was created inside the code.

import java.util.Scanner;
import java.io.File;
import java.io.IOException;

class DoPayroll
{
public static void main(String args[])
                                    throws
        IOException     
{
    Scanner diskScanner =
        new Scanner(new File("EmployeeInfo.txt"));

    for (int empNum = 1; empNum <= 3; empNum++)
    {
        payOneEmployee(diskScanner);
    }
}

static void payOneEmployee(Scanner aScanner)
{
    Employee anEmployee = new Employee();

    anEmployee.setName(aScanner.nextLine());
    anEmployee.setJobTitle(aScanner.nextLine());
    anEmployee.cutCheck(aScanner.nextDouble());
    aScanner.nextLine();
}
}

once run i recieve the following error

Exception in thread "main" java.io.FileNotFoundException: EmployeeInfo.txt (No such file or directory)
at java.io.FileInputStream.open(Native Method)
at java.io.FileInputStream.<init>(FileInputStream.java:106)
at java.util.Scanner.<init>(Scanner.java:636)
at DoPayroll.main(jobexe.java:11)

i thought that in the above code using new Scanner(new File("EmployeeInfo.txt") would create the new file once i input a value. Please give me a simple solution and an explanation.

Answer 1

You are mistaking instantiating an instance of class File with actually writing a temp file to Disk. Take this line

Scanner diskScanner =
        new Scanner(new File("EmployeeInfo.txt"));

And replace it with this

File newFile = File.createTempFile("EmployeeInfo", ".txt");
Scanner diskScanner = new Scanner(newFile);

Edit: Peter makes a good point. I’m face palming right now.