Student Class – Java
One important aspect of Java is inheritance, and how we do this in Java is to use the keyword Extend. This example, following on from assignment that was set is for the Student Class with Extends the Person class. As seen in the Person class – Java post.
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public class Student extends Person {
//Protected variables
protected Date dateEnrolled;
protected String course;
protected int year;
//Constructors
/**
* Set default values and create the student
*/
Student()
{
super();
dateEnrolled = new Date();
course = "No course yet added!";
year = 0;
}
/**
* Allow input for the creation of a student
*/
Student(String name, char sex, Date dob, String insceNumber, Date enrolled)
{
super(name, sex, dob);
natInsceNo = insceNumber;
dateEnrolled = new Date(enrolled);
course = "No course yet added!";
year = 0;
}
/**
* Allows for the cloning of a student
*/
public Student(Student other)
{//need to call the super class clone
super(other);
dateEnrolled = other.dateEnrolled;
course = other.course;
year = other.year;
}
//End of Constructors
//Start Transformers
/**
* Set the course
*/
public void setCourse(String s)
{
course = s;
}
/**
* Set the year
*/
public void setYear(int yr)
{
year = yr;
}
//Start of copy method
public void copy(Student other)
{
super.copy(other);
dateEnrolled = other.dateEnrolled;
course = other.course;
year = other.year;
}
//End of copy method
//End of Transformers
//Start of Accessors
//Get accessors
public Date getDate()
{
return dateEnrolled;
}
/**
* @return
*/
public String getCourse()
{
return course;
}
/**
* @return
*/
public int getYear()
{
return year;
}
//End of get Accessors
//Start of toString
public String toString()
{
return super.toString() + ", Course: " + course + ", Date Enrolled: " + dateEnrolled + ", Year:" + year;
}
//End of toString
//End of Accessors
}
So what we are doing here is inheriting all of the Person Class methods and using them to create a student. As we can have multiple students which inherit from a Person. Such as a Teacher is a person, therefore could extend from Person as well. Take a look at the code and try to work out what it is actually doing and focus on the Date dateEnrolled aspect.
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