Computer Science 225
Advanced Programming

Spring 2022, Siena College

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Agenda

• Welcome to CSIS 225!
  • object-oriented design and implementation
  • more advanced Java features
  • more advanced data structures
  • graphical user interfaces and event-driven programming
  • multithreading
  • general software development tools and techniques
• Please bring Java-capable computers to class; you may borrow a school laptop for when we'll do in-class programming if necessary
• Labs start this week, still looking for a better enrollment balance among the lab sections
• Syllabus
• Problem Set 1 introduction
• Some Java You Know
• In-class 1 (5 assignment points): Java at the command line, and input/output redirection

  You can find the link to create a GitHub repository that includes a Java file we will begin with in Canvas.

  We will work together to write a Java application Nonsense.java that takes a number as its only command-line parameter, reads words from the standard input (a keyboard Scanner), stopping when Ctrl-d is entered, then it should output n space-separated words each chosen randomly from among those it read in, where n was specified as the program's command-line parameter. If no command-line parameter is provided or the one provided is not a positive integer, your program should print an appropriate error message and exit. Otherwise, your program should not issue any prompts or produce any other output except the n words.

  This is a good example of a place where running the program from the command line can come in handy. If you have a plain text file words.txt with the words to use as input, you could run the program, redirecting standard input to come from the file as follows:

  java Nonsense 10 < words.txt
  

  Further, if you want to store the output of your program into a new plain text file nonsense.txt, using redirection of standard output:

  java Nonsense 10 < words.txt > nonsense.txt
  

  Add nonsense.txt to your repository, and then commit and push your completed code and that output file.

Terminology

• input/output redirection

Examples

• Late Penalty Calculators