---- Project 4 Pseudocode

import statements
Get file object with file chooser (See InputOutput Example, UseFileChooser class.)
Create scanner with file object
Create printwriter object, filename: "output-labels.txt"
Create the digits string: String digits = "-0123456789";
Create codes array: String[ ]  codes = ["", "::|||", ":::||", etc. for other digits };
while more lines in input file
    read next line from input file
    use String method split to extract fields from line
    Assign fields to name, address, city, state, zipcode
    Initialize barcode to "|"
    Initialize sum to 0
    for i going from 0 to zipcode - 1
        Get ith digit from zipcode, call it digit (digit is a char)
        Get index of barcode using String indexOf method on the digits string
        if index > 0
            convert digit to int, call it intDigit:  intDigit = (int)(digit - '0')
            sum += intDigit    
        end
        Get code for digit using codes array
        Concatenate code of digit to end of barcode
    end for
    Calculate checksum
    Concatenate code of checksum to barcode
    Concatenate terminal bar "|"

    Write fields to output file
    Write barcode to output file
end while
close scanner
close printwriter