Sureshjonna

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+”tt”+Phone+”tt”+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(“tt”+Domain+”tt”+Publications+”tt”+”–“+”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(“tt–“+”tt”+”–“+”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(“tt–“+”tt”+”–“+”tt”+”–“+”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 IDtNamettPhonettSalaryttDomaintPublicationtSkillsttPeriod”);
for(int i=0;i<3;i++)
{
staff[i].Display();
System.out.println();
}
}

}

OUTPUT : (click on image to zoom)

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