CS141: Topics for Oct 14 & 16, 2013

Homework and Reading

The reading and homework for this week can be found here: Lab 8

Begin working on the new programming assignment, TicTacToe. Instructions (pdf) and TicTacToeStubs Netbeans Project (zip)

Finish Chapter 6:

Chp 6 - Arrays and ArrayLists: We still need to cover 2D Arrays and ArrayLists

Chp 7 Vocabulary

File Ascii (text) file vs binary file Opening a file Closing a file White space

Exception Throwing an Exception Catching an Exception try-catch Delimiter

Topics: Chp 7 - Input/Output and Exception Handling

Note, we will not cover everything in this chapter. Your main task is to become familiar with the code in the Netbeans project: IOExampleProject (zip file)

• Reading ascii text files using the Scanner and File classes
• Writing to ascii text files using the PrintWriter class
• Opening and closing
• Binary data (anything other than ascii, e.g. images) - can't be represented on a console
• Checking for more data using in.hasNextInt(), in.hasNextDouble(). These return a boolean value.
• Reading words (tokens) vs lines using next()
• Converting Strings to numbers, e.g. using Double.parseDouble, Integer.parseInt()
• Exception Handling; Dealing with errors; How to gracefully survive a crash.
  • Throwing an exception
  • Catching an exception; Catching multiple exception types
  • Types of Exceptions - see Javadoc for the Exception class
  • The finally clause - cleaning up no matter what happens, e.g. closing a file

In Class Practice Activities

• Pass by Value vs Pass by Reference (pdf)
• Continue to work on Practice Array problems
• Sample Netbeans project showing how to read and write files: IOExampleProject (zip file)

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