Page 3
Creating Classes
Scenario
Congratulations! You have just been hired by the Acme Company, a worldwide
conglomerate with a diverse product portfolio, from adding machines to X-ray
machines (see http://en.wikipedia.org/wiki/Acme_Corporation). One of its best-
known products is the ever-popular Acme anvil.
Over the remaining labs, as a member of Acme, you are going to help Acme build a
product order system.
Particularly, in this lab you make your first Java class for this project. A class defines
a type that is a template for objects. It is your job to create a utility class called
MyDate. An application that will use and test your version of the MyDate type has
already been created. The test code appears below.
public class TestMyDate{
public static void main(String[] args){
MyDate date1 = new MyDate(11,11,1918);
MyDate date2 = new MyDate();
date2.day = 11;
date2.month = 11;
date2.year = 1918;
MyDate date3 = new MyDate();
date3.setDate(4,21,1968);
String str1 = date1.toString();
String str2 = date2.toString();
String str3 = date3.toString();
System.out.println(str1);
System.out.println(str2);
System.out.println(str3);
}
}
Step 1: Create a MyDate class
In this step, you create a MyDate type. The Date type already exists in Java (see
java.util.Date and java.util.Calendar). However, you create another much simpler
date type called MyDate to demonstrate object-orientated programming (OOP)
