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Thread: Scanner Issues - I think

  1. #1
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    Default Scanner Issues - I think

    Hello,

    I have all the code down and it seems to be running ok, except for one part. After I ask the user for the employee's first name, it immediately jumps to asking for the last name, without giving the user a chance to enter a first name. If needed I can post the other classes, but I figured this problem is mainly on the driver.

    import java.util.Scanner;
    import java.util.Vector;
     
    public class PRJ01
    {
        public static void main (String [] args)
        {
            Vector <Employee> emp = new Vector();
            Scanner scannerIn = new Scanner(System.in);
     
            int index = 0;
            int count = 0;
            double sum = 0;
     
            do{
                System.out.println("What type of employee would you like to enter(1 for Executive Employee, 2 for Wage Employee," +
                        " 3 for Part Time Employee. or a NEG number to quit): ");
                index = scannerIn.nextInt();
     
                if (index > 3)
                {
                    System.out.println("Please enter an appropriate number!!");
                }
                else if (index == 1)
                {
                    System.out.println("Enter the employee's ID: ");
                    int eId = scannerIn.nextInt();
                    System.out.println("Enter the employee's first name: ");
                    String fName = scannerIn.nextLine();
                    System.out.println("Enter the employee's last name: ");
                    String lName = scannerIn.nextLine();
                    System.out.println("Enter the employee's year end bonus: ");
                    double yEndBon = scannerIn.nextDouble();
                    System.out.println("Enter the employee's yearly executive bonus: ");
                    double yExBon = scannerIn.nextDouble();
     
                    ExecutiveEmployee temp = new ExecutiveEmployee(eId, fName, lName, 40, 60000.00, yEndBon, yExBon);
                    emp.add(temp);
                    count++;
     
                }
                else if (index == 2)
                {
                    System.out.println("Enter the employee's ID: ");
                    int eId = scannerIn.nextInt();
                    System.out.println("Enter the employee's first name: ");
                    String fName = scannerIn.nextLine();
                    System.out.println("Enter the employee's last name: ");
                    String lName = scannerIn.nextLine();
                    System.out.println("Enter the employee's hours worked: ");
                    double wHours = scannerIn.nextDouble();
                    System.out.println("Enter the employee's pay rate: ");
                    double pRate = scannerIn.nextDouble();
     
                    WageEmployee temp = new WageEmployee(eId, fName, lName, wHours, pRate);
                    emp.add(temp);
                    count++;
     
                }
                else
                {
                    System.out.println("Enter the employee's ID: ");
                    int eId = scannerIn.nextInt();
                    System.out.println("Enter the employee's first name: ");
                    String fName = scannerIn.nextLine();
                    System.out.println("Enter the employee's last name: ");
                    String lName = scannerIn.nextLine();
                    System.out.println("Enter the employee's hours worked: ");
                    double wHours = scannerIn.nextDouble();
                    System.out.println("Enter the employee's pay rate: ");
                    double pRate = scannerIn.nextDouble();
     
                    PartTimeEmployee temp = new PartTimeEmployee(eId, fName, lName, wHours, pRate);
                    emp.add(temp);
                    count++;
                }
     
            }while (index>0);
     
            for(int i=0; i<count; i++)
            {
                sum = sum + emp.get(i).calcWeeklyPay();
            }
     
            System.out.println("The total amount paid for employee's wages this week is: $" + sum);
     
        }
    }


  2. #2
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    Default Re: Scanner Issues - I think

    Welcome to the forum! Thanks for taking the time to learn how to post code correctly. If you haven't already, please read this topic to learn other useful info for new members.

    Scanner.nextInt() (and others) only take the next 'token' in the input buffer, leaving any other items there, usually a linefeed. Scanner.nextLine() takes everything in the input buffer, up to and including the linefeed character. When a nextLine() follows a nextInt() (and others), the buffer must be 'flushed' and thrown away, something like:
    System.out.println("Enter the employee's ID: ");
    int eId = scannerIn.nextInt();
     
    // flush the buffer
    scannerIn.nextLine();
     
    System.out.println("Enter the employee's first name: ");
    String fName = scannerIn.nextLine();

  3. The Following User Says Thank You to GregBrannon For This Useful Post:

    meni (May 11th, 2014)

  4. #3
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    Default Re: Scanner Issues - I think

    I was fiddling with it more last night, after my post. When I changed the scannerIn.nextline() to just scannerIn.next() the program was stopping to accept input. Does that work as well? On this assignment, we are not looking at the vector, only the grand total of the calcWeeklyPay() method. So my new code looks like this:
    else if (index == 1)
                {
                    System.out.println("Enter the employee's ID: ");
                    int eId = scannerIn.nextInt();
                    System.out.println("Enter the employee's first name: ");
                    String fName = scannerIn.next();
                    System.out.println("Enter the employee's last name: ");
                    String lName = scannerIn.next();
                    System.out.println("Enter the employee's year end bonus: ");
                    double yEndBon = scannerIn.nextDouble();
                    System.out.println("Enter the employee's yearly executive bonus: ");
                    double yExBon = scannerIn.nextDouble();
     
                    ExecutiveEmployee temp = new ExecutiveEmployee(eId, fName, lName, 40, 60000.00, yEndBon, yExBon);
                    emp.add(temp);
                    count++;
     
                }

    If that doesn't work (for some reason), and I understand you right, is this how my code should look instead?
    else if (index == 1)
                {
                    System.out.println("Enter the employee's ID: ");
                    int eId = scannerIn.nextInt();
                    scannerIn.nextLine();
                    System.out.println("Enter the employee's first name: ");
                    String fName = scannerIn.nextLine();
                    System.out.println("Enter the employee's last name: ");
                    String lName = scannerIn.nextLine();
                    System.out.println("Enter the employee's year end bonus: ");
                    double yEndBon = scannerIn.nextDouble();
                    System.out.println("Enter the employee's yearly executive bonus: ");
                    double yExBon = scannerIn.nextDouble();
     
                    ExecutiveEmployee temp = new ExecutiveEmployee(eId, fName, lName, 40, 60000.00, yEndBon, yExBon);
                    emp.add(temp);
                    count++;
     
                }
    Last edited by meni; May 11th, 2014 at 09:03 AM.

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