This document provides instructions for an object oriented programming assignment in Java. The assignment involves creating an Employee class with attributes like ID, age, and salary. An application class is to create Employee objects based on sample data, display details of specific employees, compute the average salary, update employee salaries, swap references to objects, and delete an object. The instructions cover creating classes, objects, attribute access, computations, references and exceptions.

1. Object Oriented Programming in Java [Lesson 1]
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Object Oriented Programming Assignment 1
Author: Kasun Ranga Wijeweera
Email: krw19870829@gmail.com
Date: 2018 April 3
1) Following table shows details of employees in a given company.
ID 1563 8659 6954 8562 2493 6485 7596
Age 18 25 32 61 52 42 72
Salary 45000 25000 30000 15000 28000 50000 35000
a) Create a class called Employee that includes three attributes given in the table. Further
the class should contain an attribute to store the average salary of the employees.
b) Create a class called Try that includes the main method.
c) Create Employee objects and store information given in the table.
d) Display the details of the employee with ID = 2493.
e) Compute the average salary of the employees and store it in the relevant attribute.
f) Display the average salary of the employees.
g) Change the salary of the employee with ID = 8659, to 20000.
h) Again compute the average salary of the employees.
i) Add 10% of the average salary to the employee with ID = 8562.
j) Assign first two Employee objects to reference variables p1 and p2 respectively.
k) Swap objects pointed by the reference variables p1 and p2.
l) Display details of the employee pointed by the reference variable p1.
m) Try to change the age of employee with ID = 6485, to 128.
n) Delete the object pointed by the reference variable p1.
o) Try to execute the statement p1.age;.