CSC152 2004F, Class 15: More Fun in Lab

Admin:
* Extension on today's homework
* New homework, too
* Make sure to share those directories and files!

Overview:
* Q and A for yesterday's lab
* New lab
  * Date interface
  * Implementation and test
  * Another implementation and test
* Comments and thoughts

/More notes on yesterday's lab and related issues/

* To move up a level in directories:
	cd ..
* To move to your home directory, use no parameters
	cd
* Share!  
  * Your directories
  * Your files (share *.java)
* To get the input on the same line as a prompt
	pen.print("Please enter your fave color: ");
	pen.flush(); // Yeah, mixed metaphors
	String fave = keyboard.readLine();
* To convert a string to a number
	String numstr = keyboard.readLine();
	int num = Integer.parseInt(numstr);
* An alternative
	int num;
	if (numstr.equals("1"))
		num = 1;
	else if (numstr.equals("2"))
		num = 2;
	else if (numstr.equals("3"))
		num = 3;
	else {
		pen.println("I'm lazy.  I'm treating " + numstr
			+ " as 4.");
		num = 4;
	}
* Note: The directory structure for a package has to go *directly* below your CS152 directory.
  * Why?
  * The Java interpreter (ji) needs to find the package and the compiled code.  If you say "lab01.rebelsky", it looks for a directory called lab01 and a directory called rebelsky within lab01.
  * If it's supposed to look "everywhere", it can take a long time.
  * If more than one of us uses the same package/directroy name (the horror!), how does it know which one to use?
  * The solution: The Java interpreter looks only in certain directories.
export CLASSPATH=".:/home/rebelsky/Web/Courses/CS152/2004F/Examples/:/home/rebelsky/CS152"

/Comments on Today's Lab/

* 30 days has September, April, June, and November.  All the rest have 31, save February, which has 28 and doesn't rhyme.
* While developing the DateV1 class, you may want to fill in STUBs for each method so that you can test each method in sequence.
	public Date tomorrow()
	{
		// STUB
		return new Date(this.dayofmonth, this.month, this.year);
	} //
	public int dayofyear()
	{
		return 0; // STUB
	}
* The simplest constructor for DateV1 (and DateV2) takes three parameters: the day of the month, the month, and the year (all as integers).
* Over-achievers might also want to support a constructor that accepts a string as a parameter.  (Overkill)
* Don't worry about DateV2 for the homework.
* integers are exact, doubles are inexact.  If you use only whole numbers, use integers.
* Hi Michael B.