Question

Develop a top-down design and write a program to produce a bar chart of gourmet-popcorn production for a cooperative farm group on a farm-by-farm basis.

• The input to the program is a series of data sets, one per line, with
  each set representing the production for one farm.
• Each data set consists of the name of a farm. Followed by a comma and
  one or more spaces, a decimal number representing acres planted, one
  or more spaces, and an integer representing the number of pint jars
  of popcorn produced for that farm.
• The output is a bar chart that identifies each farm and displays its
  production in pints of corn per acre.
• The output is a single line for each farm, with the name of the farm
  starting in the first column on a line and the bar chart starting in
  column 30. Each mark in the bar chart represents 25 pint jars of
  popcorn per acre.
• The production goal for the year is 500 jars per acre. A vertical bar
  should appear in the chart for farms with production that does not
  meet this goal, and a special mark is used for farms with production
  greater than or equal to 500 jars per acre.

For example, given the input file

Orville’s Acres, 114.8 43801
Hoffman’s Hills, 77.2 36229
Jiffy Quick Farm, 89.4 24812
Jolly Good Plantation, 183.2 104570
Organically Grown Inc., 45.5 14683

the output would be:

Popcorn Co-op
Production in Hundreds
of Pint Jars per Acre
Farm Name 1 2 3 4 5 6
---|---|---|---|---|---|
Orville's Acres *************** |
Hoffman's Hills ****************** |
Jiffy Quick Farm *********** |
Jolly Good Plantation *******************#**
Organically Grown Inc. ************ |

This is the code I have already it runs and prints the correct format but it has an exception error. I am trying to split a string up into the farm name then a double acres and finally a int jars. The input file is

Orville’s Acres, 114.8  43801
Hoffman’s Hills, 77.2  36229
Jiffy Quick Farm,       89.4  24812
Jolly Good Plantation,  183.2  104570
Organically Grown Inc., 45.5        14683

The reason for all the spaces is I want it just to read lines with data.

Here is my source code

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

public class Popcorn
{

public static void main(String args[])throws Exception
{

    printHeading(); 

    System.out.print("Input file name you want to read from: ");

    Scanner in = new Scanner(System.in);    

    String fileName = in.next();    //declares fileName a string that uses in as input

    Scanner input = new Scanner(new FileReader(fileName));  //Declares input as the fileName and reads the file in

    int jars;
    double acres;
    String amount;
    String farmName;
    System.out.println();
    System.out.println("\t\t\tPopcorn Co-op");
    System.out.println();
    System.out.println("\t\t\t\tProduction in Hundreds");
    System.out.println("\t\t\t\tof Pint Jars per Acre");
    System.out.println("Farm Name\t\t\t   1   2   3   4   5   6");
    System.out.println("\t\t\t\t---|---|---|---|---|---|");


    while (input.hasNextLine())
    {


        String inputLine = input.nextLine();    

        if (inputLine.isEmpty())
        {   

        }
        else 
        {
            farmName = inputLine.substring(0,inputLine.indexOf(','));
            String inputLine2 =  inputLine.substring(inputLine.indexOf(','),inputLine.length());
            Scanner line = new Scanner(inputLine2);
            acres = line.nextDouble();
            jars = line.nextInt();
            System.out.println(farmName + jars + acres);

        }

    }
}

private static void printHeading(){


    System.out.println("Name");  //this assigns what printHeading will print
    System.out.println("CSC 201-55468 Section 01PR");
    System.out.println("Fall 2012");
    System.out.println("Popcorn Project");
    System.out.println();
    }

}

Answer 1

String inputLine2 =  inputLine.substring(inputLine.indexOf(',') + 1);

This skips the comma, which the original line did not.

Maybe it is:

line.skip("[ \t]+");

that is needed to skip the space in front.

---

After trying the code with indexOf+1 (without skip):

...
Orville’s Acres43801114.8
Hoffman’s Hills3622977.2
Jiffy Quick Farm2481289.4
Jolly Good Plantation104570183.2
Organically Grown Inc.1468345.5

Which seems fine, considering:

            System.out.println(farmName + jars + acres);

As this seems homework, I leave it at that.