Lab Manual Object O r i ent ed P r ogr ammi ng w i th JA V...

KLE Society's KLE Technological University

SCHOOL OF COMPUTER SCIENCE & ENGG

Lab Manual

Object Oriented Programming with JAVA

(15ECSP203)

2016 17



Sl. No. Contents

1. Course Outcomes (COs)

2. List of Experiments

3. Introduction to Object Oriented Programming

4. Standard Operating Procedure

5. Java Tools

6 Procedure to Create and Execute Java Project in Eclipse IDE

7. Example for Experiments



Course Outcomes (COs) At the end of the course the student should be able to:

1. Apply Object Oriented Programming concepts to solve a given problem.

2. Apply design patterns to design a solution for a given problem.

3. Apply inheritance, polymorphism and exception handling mechanism to implement

reusable, robust java programs.

4. Perform unit testing for an identified method/methods of a class/classes.

5. Implement user interface java programs for a given scenario.

List of Experiments

Sl. No. Category Topics for experiments to be conducted under each

category

1. Exercises

Arrays, Strings and StringBuffer

Classes and Objects

Inheritance and Polymorphism

Runtime Error Management : Exception Handling

2. Structured Enquiry

Classes and Objects

Inheritance and Polymorphism

Runtime Error Management : Exception Handling

GUI Design and Event Handling

3. Open Ended Problem domain will be given to a group of students, which is based on the exercises of the laboratory course. Implementation has to be carried out in the laboratory.



Introduction to Object Oriented Programming

The object oriented paradigm is built on the foundation laid by the structured

programming concepts. The fundamental change in OOP (Object Oriented Programming) is that

a program is designed around the data being operated upon rather upon the operations

themselves. Data and its functions are encapsulated into a single entity. OOP facilitates creating

reusable code that can eventually save a lot of work. A feature called polymorphism permits to

create multiple definitions for operators and functions. Another feature called inheritance permits

to derive new classes from old ones. OOP introduces many new ideas and involves a different

approach to programming than the procedural programming.

Benefits of object oriented programming ● Data security is enforced (Data Centric).

● Inheritance saves time (Reusability).

● User defined data types can be easily constructed.

● Large complexity in the software development can be easily managed.

Standard Operating Procedure

The Standard Operating Procedure (SOP) defines how the laboratory course is conducted for

Object Oriented programming with JAVA lab and it is defined by the following steps.

1. The student has to come to lab with class notes and it is used as a ready reference for

the concepts discussed in the class room.

2. The first activity for the student is to practice the class room programs (code) and verify

the programs with different test cases.

3. All the students once complete the class room programs, they will be given an

assignment and it is individual activity. This assignment test the ability of the student to

apply the concepts taught in the class room. This assignment is guided assignment

where the student is assisted ondemand, in solving the problem.

4. The step 3 is optional and all the students are evaluated as per the category of

experiments.



5. Evaluation procedure : The student has to first submit the written proposed solution for

a given problem statement and it is verified (evaluated as per the rubrics) by the faculty

then the student can type the code and demonstrate.

Evaluation

Students Assessment Through ISA (80%) + ESA (20%)

Assessment Marks

Internal Semester Assessment (80%)

Exercises 40

Structured Enquiry 20

Open Ended and Course Activity 20 + 5*

Semester End Assessment (20%) 20

TOTAL MARKS 100 + 5* * Indicates marks from theory CIE.

Java Tools

● The students will be introduced to the following topics

● Introduction to the java environment

● Use of IDE (Eclipse)

● Defining simple classes and creating objects.



Procedure to Create and Execute Java Project in Eclipse IDE 1. Choose File → New → Java Project from the Eclipse menu bar, as in the following

example :

2. The following window will be displayed. Enter the Project name and make sure the "Use

Project folder as root for sources and class files" option is selected in the "Project layout"

section as shown in the image below:



3. If you click the "Configure default..." link in the "Project Layout" area, you can make

these settings your default settings for new projects. Select "Project" for the "Source

and output folder" option and click "OK" button. We recommend that students configure

Eclipse in this way.

4. After returning to the New Project Wizard dialog box, click Finish to actually create the

project you just described. The following screen will be displayed, denoting a workspace

with one project to choose from the Package Explorer:

Note: If you forgot to close the Welcome screen (shown in the prior step), then you will

not see the above window. To close the Welcome screen, click the X on the tab labeled



Welcome (towards the top left of the Eclipse window). Now you should see the

workspace.

5. Congratulations, you have created your first Java project! But, we're only part way there.

Next comes putting some substance (code) into the project to make a working program!

6. We need to create a source file where we will write our program. Rightclick on the

"HelloWorld" project in the Package Explorer tabbed pane on the left side of the screen

and navigate to New → Class, as in the following example:

7. Another window will be displayed. Then click in the text box labeled "Name:" and type in

HelloWorld, as in the following example:



Click Finish. This step will create a new file named HelloWorld.java and add it to the

project for you. It will also open a tabbed window where you can edit the HelloWorld.java

source file.

8. Now that we've completed the setup we can write the program. Enter the following text

into the HelloWorld.java window.

9. Go to the left Package Explorer pane. The HelloWorld folder should be opened, but if it

is not, doubleclick on folder to open it. Then, double click on the "(default package)" to



access theHelloWorld.java file. Rightclick on the file and select Run As → Java

Application.

Example for Experiments

1. Design java application to model Employee of an “ABC” organization. Consider types of

employees as

a. Manager

b. Sales Person

Perform the following a. Implement simple inheritance where Employee (employee ID, First Name, Last

Name, Current salary) is super class, consider Manager (number of stock

options) and SalesPerson (number of sales, commission rate) as subclasses.

b. Define parameterized constructors in class hierarchy.

c. Define methods to display status of employee (override toString() ) and increase

current payment (salary) as giving bonus by a small amount.

d. Identify the different options of giving bonus (to increase current pay by small

amount) and consider type of employee while giving bonus. Apply polymorphism

for methods using inheritance in class hierarchy.

e. Create an array of super class variables and populate array with sub class

objects. Call methods using array of objects.

2. Create class Employee with name, Id, cellNum, designation, department, salary

permanent (boolean) as members. Also create separate class for member name as

EmpName, department as Department and salary as Salary. Members of EmpName

are firstName, midName, lastName . Members of Salary are basic, daPercent, hra , pf,

insurance. Members of Department are deptName,deptCode. Create an instance of Employee and initialize all its members from user input console.

Access the same instance by more than one reference of Employee. Count the number

of references and objects being created. [class,references,objects].

3. Create a super class Bindu {x,y} and subclass Bindu3d {z}



a. include a parameterized constructor in class Bindu to initialize object.

b. include a method in class Bindu to print data members of object. Override the

same method in subclass and reuse the inherited method in it

c. Create final static member printArr (Bindu[ ]) which print array of objects. In this

method use above method to print member of individual objects of array.

d. Write test class to create to array of Bindu3d type. Use the above method to print

all the objects of array.

4. A bank maintains two kinds of accounts – Savings account and Current account. The

savings account provides simple interest, deposit and withdrawal facilities. The current

account only provides deposit and withdrawal facilities. Current account holders should

also maintain minimum balance. If balance falls below minimum level a service charge is

imposed. Create an abstract class Account that stores customer name, account number

type of account and abstract methods. From this derive the classes Curr_Account

(double balance, double min_bal, double serviceCharge / penalty) and and Sav_Account

(double balance). Include the necessary methods in order to achieve the

following:

a. Define parameterized constructor in a class hierarchy.

b. Allow deposit and update the balance.

c. Display the balance.

d. Compute interest and add to balance.

e. Permit withdrawal and update the balance (check for minimum balance).

f. Apply polymorphism if required for methods in class hierarchy.

g. Create an array of super class / object and populate with subclass objects and

call the overridden / object methods.

h. Write a test program to demonstrate the above said implementations.

5. Define a interface EMPInterface (void displayEMP(), void giveBonus (double amount)).

Define an abstract class Employee(empID, fName, lName, salary). Define a concrete

class Manager (noOfOtockOptions), subclass of Employee and define interface

methods.

Perform the following



a. Define appropriate constructors in a class hierarchy.

b. Ensure the bonus amount should not be negative and zero using exception

handling mechanism (use throws and throw clauses of exception handling).

c. Create array of interface reference variables and populate with manager objects.

d. Write a test program to implement the above said requirements of interface

implementation and exception handling.

6. Create an interface mobilePhone {makeAudioCall (string ellNum), makeVideoCall (string

cellNum), Boolean isCamerFeatured()}

a. Create a subclass BudgetPhone, smartPhone and implement methods

appropriately.

b. Create an exception class cameraNotfound use it handle exception when a video

call attempt is made on noncamera phone. In such case audio call should be

made to handle such exceptions.

7. Create window through which an account of a customer for a bank can be

created and stored as objects. Also include a feature to search customer based on

account number.

8. Create a window to input minor1, minor2 and assignment marks for a student and store

it as object, also provide feature to display total marks of each student and number of

students in each grade.

9. Write a java program to accept user name in a text box. Accept the class of the user

(Faculty, student, admin etc.,) using radio buttons and the hobbies of the user using

checkboxes. Display the selected options in a textarea/textbox.

10. Simulate loan application. The loans are four wheeler loan and two wheeler loan. The

application has to provide functionality to calculate EMI, pay EMI and display the

customer details along with his loan details till he clears the loan. The rate of interest for

two wheeler loan changes from lower to higher value, the application should update the

changes. Consider some collection (array) to store different loan objects. Define

appropriate classes, constructors, objects and other constructs to complete the

implementation.

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