CS 113 Postal Barcode

Overview: Postal barcode (Exercise 2.1.36). The initial barcode 1 used by the U.S Postal System to route mail is defined as follows: Each decimal digit in the ZIP code is encoded using a sequence of three half-height and two full-height bars. The barcode starts and ends with a full-height bar (the guard rail) and includes a checksum digit (after the five-digit ZIP code or the nine-digit ZIP+4 code), computed by summing up the original digits modulo 10. Implement the following functions

• Draw a half-height or full-heigh bar on StdDraw.
• Given a digit, return the binary code of that digit as a String.
• Compute the checksum digit.
• Given a String of 1's and 0s, draw the corresponding barcode in which 1s are full- height bars and 0s are half-height bars. The barcode should be centered in the StdDraw canvas.

Implement a test client that reads in a five or nine digit ZIP code as the command line argument and draws the corresponding postal barcode.

Details

• Name the program PP2.java.
• Use the following table to map a digit to barcodes see image.
• The binary code use 1 for full-height and 0 for half-height bars of the barcode.
• The width of a bar should be 1/10 of the height of the full-height bar.
• The space between bars should be the same as the width of a bar.
• Use an appropriate height to make it easy to see the barcode when displayed (if printed, we would want 24 bars per inch).
• The checksum digit is the value when added to the sum of the original digits, causes the sum modulo 10 to be zero. Example: digits 0 8 5 4 0 would sum to 17. The checksum would be 3 as (17+3) modulo 10 is zero. Note that this differs from the textbook example of 7.
• Validate the command line parameters. If invalid values are given then print out a warning message.
• Your program should display your name and lab CRN at the top of the StdDraw canvas showing the barcode. StdDraw provides a set of functions for writing text to the display.
• The original Zip code and the calculated checksum digit should be displayed at the bottom of the StdDraw canvas.
• the barcode should be centered in the middle of the StdDraw canvas.