Java Inheritance Sample Program

Inheritance Example Program in Java

import java.util.*;

/**

* This program demonstrates inheritance.

*/

public class ManagerTest

{

public static void main(String[] args)

{

// construct a Manager object

Manager boss = new Manager("Carl Cracker", 80000, 1987, 12, 15);

boss.setBonus(5000);

Employee[] staff = new Employee[3];

// fill the staff array with Manager and Employee objects

staff[0] = boss;

staff[1] = new Employee("Harry Hacker", 50000, 1989, 10, 1);

staff[2] = new Employee("Tommy Tester", 40000, 1990, 3, 15);

// print out information about all Employee objects

for (Employee e : staff)

System.out.println("name=" + e.getName() + ",salary=" + e.getSalary());

}

}

class Employee

{

public Employee(String n, double s, int year, int month, int day)

{

name = n;

salary = s;

GregorianCalendar calendar = new GregorianCalendar(year, month - 1, day);

hireDay = calendar.getTime();

}

public String getName()

{

return name;

}

public double getSalary()

{

return salary;

}

public Date getHireDay()

{

return hireDay;

}

public void raiseSalary(double byPercent)

{

double raise = salary * byPercent / 100;

salary += raise;

}

private String name;

private double salary;

private Date hireDay;

}

class Manager extends Employee

{

/**

* @param n the employee's name

* @param s the salary

* @param year the hire year

* @param month the hire month

* @param day the hire day

*/

public Manager(String n, double s, int year, int month, int day)

{

super(n, s, year, month, day);

bonus = 0;

}

public double getSalary()

{

double baseSalary = super.getSalary();

return baseSalary + bonus;

}

public void setBonus(double b)

{

bonus = b;

}

private double bonus;

}

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