CS 257: Software Design

EncodingHelper, Phase 3 of 3

Continue with your partner, one more time.

For this assignment, you will complete an implementation of the EncodingHelper application, as described below.

The EncodingHelperChar class from last time will be a big help, but you will now need to add facilities for parsing the command line arguments and, for some operations, converting strings (not just single characters) into various forms. Your EncodingHelper class will contain the main method for this program, but you'll also want to give it methods for string conversion.

For example, you might want to write a method that converts a character string (typically obtained from main's args parameter) into an array or ArrayList of EncodingHelper objects. As you design the methods you need, keep in mind the ideas articulated in Steve McConnell's High-Quality Routines.

Also, for each non-trivial method you add to your project, you should add at least one unit test method.

EncodingHelper's command-line syntax

Usage examples

• One-character string, default input and output.

  $ java EncodingHelper é Character: é Code point: U+00E9 Name: LATIN SMALL LETTER E WITH ACUTE UTF8: \xC3\xA9

• Multi-character string, default input and output.

  $ java EncodingHelper être String: être Code points: U+00EA U+0074 U+0072 U+0065 UTF-8: \xC3\xAA\x74\x72\x65

• String input, UTF-8 output

  $ java EncodingHelper --outputtype=utf8 être \xC3\xAA\x74\x72\x65

• Code point input, default output

  $ java EncodingHelper --inputtype=codepoint U+00E9 Character: é Code point: U+00E9 Name: LATIN SMALL LETTER E WITH ACUTE UTF8: \xC3\xA9

• UTF-8 input, code point output

  $ java EncodingHelper --inputtype=utf8 --outputtype=codepoint '\xC3\xAA' U+00EA

  Note that for the bash command line, and most others, if you want special characters like the backslash \ to be included properly in Java's main method "args" parameter, you need to enclose the command-line argument in single-quotation marks (i.e. apostrophes).

  
  

• UTF-8 input, string output

  $ java EncodingHelper --inputtype=utf8 --outputtype=string '\xC3\xAA\x74\x72\x65' être

Handing it in

Submit your program by committing it to your bitbucket repository and tagging it with a tag named "phase3".

Have fun!