CMPU-181, Spring 2013
Interactions like those seen in class
March 4, 2013


Welcome to DrJava.  Working directory is /Users/hunsberg/Desktop
> // Class-oriented data are like global variables in Scheme, except that they belong 
> // to a particular class.  For example, the MarchFourth class contains "variables"
> // named x, str, c and dbl.
> MarchFourth.x
0
> MarchFourth.x = 5
5
> MarchFourth.x
5
> MarchFourth.str = "hi there"
"hi there"
> MarchFourth.str
"hi there"
> MarchFourth.c = 'L'
'L'
> MarchFourth.c
'L'
> MarchFourth.dbl = 102.321
102.321
> MarchFourth.dbl * 100
10232.1
> MarchFourth.dbl
102.321
> MarchFourth.dbl + 1000.0009
1102.3219
> // Class-oriented functions (a.k.a. methods) are just like the functions we defined
> // in Scheme, except that they belong to a class.  So, when we "call" them, we need
> // to include the class name.  For example, the MarchFourth class contains a 
> // function called FACTY.
> MarchFourth.facty(3)
6
> MarchFourth.facty(5)
120
> MarchFourth.facty(10)
3628800
> // Class-oriented functions and class-oriented data are indicated by the STATIC keyword.
> // See the examples in the MarchFourth class.  Each data item (or "field") is declared
> // to be static.  The function, FACTY, is also declared to be static.
>