Computer Science 252
Problem Solving with Java

Spring 2016, The College of Saint Rose

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Agenda

• Announcements
  • Lab 10: Final Project designs due today
• Exam 3 recap
• Lab 12: ArrayList Practice recap
• Lecture 23 assignment recap
• Command-line parameters to Java applications (not in notes)
• Matrices
• Strings and Characters (will not cover specifially in class)

Lecture 24 Assignment

Due at the start of class, Tuesday, May 3.

Please submit answers to these questions either as a hard copy (typeset or handwritten are OK) or by email to terescoj AT strose.edu by the start of class. Please use a clear subject line when submitting by email (e.g., CSC 252 Lecture 24 Assignment, Mary Smith). We will discuss these questions at the start of class, so no late submissions are accepted.

(20 points) Write a Java application in a class WordStats that takes the name of a text file as its command-line parameter, then reads all of the words in that file. It should ignore any word that contains a non-alphabetic character, but consider all other words to compute the information below. Your program should report to standard output (the terminal window) the following information:

• the number of words read in
• the first and last words alphabetically, ignoring case
• the longest and shortest words (list all words of the shortest and longest length, but only once each)
• the number of words that contain the substring "and" anywhere within the word
• the total number of times the letter 'e' (upper or lower case) occurs in all of the words that you did not ignore

Include simple error checking to ensure that the command-line parameter exists, and that the file was successfully opened.

Terminology

• matrices
• object types
• non-object/base/primitive types
• immutable
• characters
• ASCII
• Unicode

Examples

• Matrix2D