DAA 2 A - TO DISPLAY 3 STAFF OBJECTS OF ALL THREE CATEGORIES

2 A - Design a superclass called Staff with details as StaffId, Name, Phone, Salary. Extend this class by writing three subclasses namely Teaching (domain, publications), Technical (skills), and Contract (period). Write a Java program to read and display at least 3 staff objects of all three categories.

class Staff
{
private int StaffId;
private String Name;
private String Phone;
private long Salary;

public Staff(int staffId,String name,String phone,long salary)
{
StaffId = staffId;
Name = name;
Phone = phone;
Salary = salary;
}
public void Display()
{
System.out.print("\t"+StaffId+"\t"+Name+"\t\t"+Phone+"\t\t"+Salary);
}
}

class Teaching extends Staff
{
private String Domain;
private int Publications;

public Teaching(int staffId, String name, String phone,long salary, String domain, int publications)
{
super(staffId, name, phone, salary);
Domain = domain;
Publications = publications;
}
public void Display()
{
super.Display();
System.out.print("\t\t"+Domain+"\t\t"+Publications+"\t\t"+"--"+"\t"+"--");
}
}

class Technical extends Staff
{
private String Skills;
public Technical(int staffId, String name, String phone,long salary, String skills)
{
super(staffId, name, phone, salary);
Skills = skills;
}
public void Display()
{
super.Display();
System.out.print("\t\t--"+"\t\t"+"--"+"\t"+Skills+"\t"+"--");
}
}

class Contract extends Staff
{
private int Period;
public Contract(int staffId, String name, String phone, long salary, int period)
{
super(staffId, name, phone, salary);
this.Period = period;
}
public void Display()
{
super.Display();
System.out.print("\t\t--"+"\t\t"+"--"+"\t\t"+"--"+"\t"+Period);
}
}

public class lab2a
{
public static void main(String[] args)
{
Staff staff[]=new Staff[3];
staff[0]=new Teaching(0001,"Narendr","271173",90000,"CSE",3);
staff[1]=new Technical(0002,"Ara","271172",2000,"Server Admin");
staff[2]=new Contract(0003,"Rahul","271174",9000,3);
System.out.println("Staff ID\tName\t\tPhone\t\tSalary\t\tDomain\tPublication\tSkills\t\tPeriod");
for(int i=0;i<3;i++)
{
staff[i].Display();
System.out.println();
}
}

}

OUTPUT : (click on image to zoom)