Problem with Java

I am having problems identifing the appropriate class names, attributes and methods for the following objects.  I need at least 3 attributes and 3 methods for each class.

STUDENT
INSTRUCTOR
CLASS
MAJOR


For Example:

Class Name
Student

Attributes
socialSecurityNumber;
studentName;
studentDOB;

Methods
getStudentName();
getTotalStudentCount();
setStudentID(ssn, fname);

I have part of it done but im not sure where to go from there.
Thanks

public class Student {

// methods
public void setName(String name){}
public void getStudentName(){}
public void setTotalStudentCount(){}
public void getTotalStudentCount(){}
public void setSS(String ssn){}
public void getSS(){}

// attrs
String name;
String ssn;
String studentMajor;
}