Held: Friday, 13 September 2013

Back to Outline 08 - Some Basic Types: Numbers and Strings in Java. On to Outline 10 - Exceptional Programming.

Summary

We consider basic mechanism for textual input and output in Java.

Related Pages

• Reading: I/O
• Lab: I/O
• EBoard (Source) (PDF)

Overview

• Leftover types topics.
• A few notes on textual output and input.
• Output.
• Input.
• Lab.

Administrivia

• Reading for Monday (it's ready!)
  • Exceptions
• I've prepared a lab for today, but I don't know if there will be time.
• I hear that some of you are losing files. You should make it a practice to save early and often. You should also make it a practice to commit regularly. (Say, after each working procedure you write.)
• I'm in the midst of grading HW2. I should have it done by Monday. We'll discuss the averaging problem.
• Only about half the class has filled out the prologue (as of 8:30 p.m. on Thursday)
  • Do you want hints on the strategy?
  • Your initial solution will be inefficient. That's okay. (And yes, it can stay inefficient.)
  • Hint number one: An exhaustive approach is a reasonable start.
• EC opportunities:
  • CS Table, Friday: Trusting Trust.
  • CS Table, next Friday: Pair Programming.
  • More?

Leftover Stuff on Basic Types

• I'll do a quick review.
• Do you have questions from the readings?
• Make sure to browse the API so that you can see what functions are available.

Textual Input and Output

• For many years, the only way you interacted with the computer was from the command line.
• These days, we more frequently interact via more complicated GUIs.
• But it's still nice to be able to generate and read text (not least because we'll want to store data in files and retrieve data from those files).

Output

• We'll explore output by looking at the Java API for some basic output classes. (In part, we're doing it this way because you need to get used to reading the API.)
• The classes we'll consider are
  • java.io.PrintWriter
  • java.io.File

Input

• We'll explore input by looking at the Java API for some basic input classes. (In part, we're doing it this way because you need to get used to reading the API.)
• The classes we'll consider are
  • java.io.InputStreamReader
  • java.io.BufferedReader
  • java.io.FileReader

Lab

• There should be a bit of time to start the lab.