Lab Manual Object Oriented Programming through JAVA.pdf

(AUTONOMOUS INSTITUTION – UGC, GOVT. OF INDIA)
Department of CSE
(Emerging Technologies)
Object Oriented Programming through
JAVA
LAB MANUAL
MRCET CAMPUS

Object Oriented Programming through
JAVA
LABORATORY MANUAL
B.TECH (R-20 Regulation)
(II YEAR – II SEM)
(2021-22)
DEPARTMENT OF CSE
(EMERGING TECHNOLOGIES)
MALLA REDDY COLLEGE OF ENGINEERING &
TECHNOLOGY
(Autonomous Institution – UGC, Govt. of India)
Recognized under 2(f) and 12 (B) of UGC ACT 1956
(Affiliated toJNTUH, Hyderabad, Approved by AICTE - Accredited by NBA & NAAC – ‘A’ Grade - ISO 9001:2015 Certified)
Maisammaguda, Dhulapally (Post Via. Hakimpet), Secunderabad – 500100, Telangana State, India

Department of Computer Science and Engineering
Vision
 To acknowledge quality education and instill high patterns of discipline
making the students technologically superior and ethically strong
which involves the improvement in the quality of life in human race.
Mission
 To achieve and impart holistic technical education using the best of infrastructure,
outstanding technical and teaching expertise to establish the students in to
competent and confident engineers.
 Evolving the center of excellence through creative and innovative teaching learning
practices for promoting academic achievement to produce internationally accepted
competitive and world class professionals.

PROGRAM OUTCOMES (POs)
Engineering Graduates will be able to:
1. Engineering knowledge: Apply the knowledge of mathematics, science, engineering
fundamentals, and an engineering specialization to the solution of complex engineering
problems.
2. Problem analysis: Identify, formulate, review research literature, and analyze complex
engineering problems reaching substantiated conclusions using first principles of
mathematics, natural sciences, and engineering sciences.
3. Design / development of solutions: Design solutions for complex engineering problems and
design system components or processes that meet the specified needs with appropriate
consideration for the public health and safety, andthe cultural, societal, and environmental
considerations.
4. Conduct investigations of complex problems: Use research-based knowledge and research
methods including design of experiments, analysis and interpretation of data, and synthesis of
the information to provide valid conclusions.
5. Modern tool usage: Create, select, and apply appropriate techniques, resources, and modern
engineering and IT tools including prediction and modeling to complex engineering activities
with an understanding of the limitations.
6. The engineer and society: Apply reasoning informed by the contextual knowledge to assess
societal, health, safety, legal and cultural issues and the consequent responsibilities relevant to
the professional engineering practice.
7. Environment and sustainability: Understand the impact of the professional engineering
solutions in societal and environmental contexts, and demonstrate the knowledge of, and need
for sustainable development.
8. Ethics: Apply ethical principles and commit to professional ethics andresponsibilities and
norms of the engineering practice.
9. Individual and team work: Function effectively as an individual, and as a memberor leader
in diverse teams, and in multidisciplinary settings.
10. Communication: Communicate effectively on complex engineering activities with the
engineering community and with society at large, such as, being able to comprehend and write
effective reports and design documentation, make effective presentations, and give and
receive clear instructions.
11. Project management and finance: Demonstrate knowledge and understanding of the
engineering and management principles and apply these to one’s own work, as a member and
leader in a team, to manage projects and in multi disciplinary environments.
12. Life- long learning: Recognize the need for, and have the preparation and ability to engage in
independent and life-long learning in the broadest context of technological change.

Lab Objectives:
 To prepare students to become familiar with the Standard Java technologies of
J2SE
 To prepare students to excel in Object Oriented programming and to succeed as a
Java Developer through global rigorous education.
 To provide Students with a solid foundation in OOP fundamentals required to solve
programming problems and also to learn Advanced Java topics like J2ME, J2EE,
JSP, JavaScript
 To train Students with good OOP programming breadth so as to comprehend,
analyze, design and create novel products and solutions for the real life problems.
 To inculcate in students professional and ethical attitude, multidisciplinary
approach and an ability to relate java programming issues to broader application
context.
 To provide student with an academic environment aware of excellence, written
ethical codes and guidelines and lifelong learning needed for a successful
professional career.
Lab Outcomes:
Upon successful completion of this course, the students will be able to:
 Able to analyze the necessity for Object Oriented Programming paradigm and
over structured programming and become familiar with the fundamental concepts
in OOP.
 Demonstrate an ability to design and develop java programs, analyze, and
interpret object oriented data and report results.
 Demonstrate an ability to design an object oriented system, AWT
components or multithreaded process as per needs and specifications.
 Demonstrate an ability to visualize and work on laboratory and multidisciplinary
tasks like console and windows applications both for standalone and Applets
programs

B.Tech – CSE (Emerging Technologies) R-20
OOPs through JAVA MRCET CAMPUS
Introduction about lab
System configurations are as follows:
 Hardware / Software’s installed: Intel® CORE™ i3-3240 CPU@3.40GHZRAM:
4GB / C, C++ Compiler, JAVA JDK 1.8, EditPlus.
 Systems are provided for students in the 1:1 ratio.
 Systems are assigned numbers and same system is allotted for students when theydo
the lab.
 All Systems are configured in LINUX, it is open source and students can use any
different programming environments through package installation.
Guidelines to students
A. Standard operating procedure
a) Explanation on today’s experiment by the concerned faculty using PPT covering
the following aspects:
1) Name of the experiment
2) Aim
3) Software/Hardware requirements
4) Writing the java programs by the students
5) Commands for executing programs
Writing of the experiment in the Observation Book
The students will write the today’s experiment in the Observation book as per the
following format:
a) Name of the experiment
b) Aim
c) Writing the program
d) Viva-Voce Questions and Answers
e) Errors observed (if any) during compilation/execution
Signature of the Faculty

B. Guide Lines to Students in Lab
Disciplinary to be maintained by the students in the Lab
 Students are required to carry their lab observation book and record book withcompleted
experiments while entering the lab.
 Students must use the equipment with care. Any damage is caused student ispunishable.
 Students are not allowed to use their cell phones/pen drives/ CDs in labs.
 Students need to be maintain proper dress code along with ID Card
 Students are supposed to occupy the computers allotted to them and are notsupposed to
talk or make noise in the lab.
 Students, after completion of each experiment they need to be updated in observation
notes and same to be updated in the record.
 Lab records need to be submitted after completion of experiment and get itcorrected with
the concerned lab faculty.
 If a student is absent for any lab, they need to be completed the same experiment in the
free time before attending next lab.
Steps to perform experiments in the lab by the student
Step1: Students have to write the date, aim and forthat experiment in the observation book.
Step2: Students have to listen and understand the experiment explained by the faculty and
note down the important points in the observation book.
Step3: Studentsneed to write procedure/algorithm in the observation book.
Step4: Analyze and Develop/implement the logic of the program by the student in
respective platform
Step5: After approval of logic of the experiment by the faculty then the experiment has to be
executed on the system.
Step6: After successful execution the results are to be shown to the faculty andnoted the
same in the observation book.
Step7: Students need to attend the Viva-Voce on that experiment and write the samein the
observation book.
Step8: Update the completed experiment in the record and submit to the concernedfaculty
in-charge.

Instructions to maintain the record
 Before start of the first lab they have to buy the record and bring the record to thelab.
 Regularly (Weekly) update the record after completion of the experiment and get itcorrected
with concerned lab in-charge for continuous evaluation. In case the record is lost inform the
same day to the faculty in charge and get the new record within 2 days the record has to be
submitted and get it corrected by the faculty.
 If record is not submitted in time or record is not written properly, the evaluation marks (5M)
will be deducted.
Awarding the marks for day to day evaluation
Total marks for day to day evaluation is 15 Marks as per Autonomous (JNTUH).These 15
Marks are distributed as:
Regularity 3 Marks
Program written 3 Marks
Execution & Result 3 Marks
Viva-Voce 3 Marks
Dress Code 3 Marks
Allocation of Marks for Lab Internal
Total marks for lab internal are 30 Marks as per Autonomous (JNTUH.)
These 30 Marks are distributed as:
Average of day to day evaluation marks: 15 Marks
Lab Mid exam: 10 Marks
VIVA & Observation: 5 Marks
Allocation of Marks for Lab External
Total marks for lab Internal and External are 70 Marks as per Autonomous / (JNTUH).
These 70 External Lab Marks are distributed as:
Program Written 30 Marks
Program Execution and Result 20 Marks
Viva-Voce 10 Marks
Record 10 Marks

C. General laboratory instructions
1. Students are advised to come to the laboratory at least 5 minutes before (to thestarting time),
those who come after 5 minutes will not be allowed into the lab.
2. Plan your task properly much before to the commencement, come prepared to thelab with
the synopsis / program / experiment details.
3. Student should enter into the laboratory with:
a. Laboratory observation notes with all the details (Problem statement, Aim, Algorithm,
Procedure, Program, Expected Output, etc.,) filled in for the lab session.
b. Laboratory Record updated up to the last session experiments and other utensils (if any)
needed in the lab.
c. Proper Dress code and Identity card.
4. Sign in the laboratory login register, write the TIME-IN, and occupy the computersystem
allotted to you by the faculty.
5. Execute your task in the laboratory, and record the results / output in the labobservation note
book, and get certified by the concerned faculty.
6. All the students should be polite and cooperative with the laboratory staff, mustmaintain the
discipline and decency in the laboratory.
7. Computer labs are established with sophisticated and high end branded systems, which
should be utilized properly.
8. Students / Faculty must keep their mobile phones in SWITCHED OFF mode during the lab
sessions. Misuse of the equipment, misbehaviors with the staff and systems etc., will attract
severe punishment.
9. Students must take the permission of the faculty in case of any urgency to go out ; if anybody
found loitering outside the lab / class without permission during working hours will be
treated seriously and punished appropriately.
10. Students should LOG OFF/ SHUT DOWN the computer system before he/she leaves the
lab after completing the task (experiment) in all aspects. He/she must ensure the system / seat
is kept properly.
Head of the Department Principal

INDEX
S.No
List of Programs
PageNos.
1 Write a java program to find the Fibonacci series using recursiveand non
recursive functions
1
2 Write a java program to multiply two given matrices. 3
3 Write a java program for Method overloading and Constructor
overloading
4
4 Write a java program to display the employee details using
Scanner class
6
5 Write a java program that checks whether a given string is
palindrome or not
7
6 A)Write a java program to represent Abstract class with example. 8
B)Write a java program to implement Interface using extends keyword 9
7 A) Write a java program to create inner classes 11
B) Write a java program to create user defined package 12
8 A)Write a java program for creating multiple catch blocks 13
B)Write a java program for producer and consumer problem using Threads 14
9 Write a Java program that implements a multi-thread application that has
three threads
16
10 A)Write a java program to display File class properties 18
B)Write a java program to represent ArrayList class 19
C)Write a Java program loads phone no, name from a text file using hash 20
table
11 Write an applet program that displays a simple message 23
12 A)Write a Java program compute factorial value using Applet 24
B)Write a program for passing parameters using Applet 26
13 A) Write a java program for handling Mouse events and Key events 27
B) Write a java program for handling Key events 31
14 Write a java program that connects to a database using JDBC 33
15 A)Write a java program to connect to a database using JDBC and insert 34
values into it.
36
B)Write a java program to connect to a database using JDBC and delete
values from it
16 Write a java program that works as a simple calculator. Use a Grid Layout
to arrange Buttons for digits and for the + - * %operations. Add a text field to
display the result
38-45

Malla Reddy College of Engineering and Technology (MRCET CAMPUS) P a g e | 1
WEEK -1 Date:
Aim: Write a java program to find the Fibonacci series using recursive and non
recursivefunctions
Program:
class fib
{
int a,b,c;
void nonrecursive(int n) //Non recursive function to find the Fibonacci series.
{
a=0;
b=1;
System.out.print(a+ "" + b);
c=a+b;
while(c<=n)
{
System.out.print(c);
a=b;
b=c;
c=a+b;
}
}
int recursive(int n) // Recursive function to find the Fibonacci series.
{
if(n==0)
return (0);
if(n==1)
return (1);
else
return(recursive(n-1)+recursive(n-2));
}
}
// Class that calls recursive and non recursive functions
class fib1
{
public static void main(String args[])
{
int n=5;
System.out.println("The Fibonacci series using non recursive is");
// Creating object for the fib class.
fib f=new fib();
// Calling non recursive function oF fib class.
f.nonrecursive(n);
System.out.println("n The Fibonacci series using recursive is");
for(int i=0;i<=n;i++)
{
// Calling recursive function of fib class.
int F1=f.recursive(i);
System.out.print(F1);
}
}
}

R-20
B.Tech – CSE (Emerging Technologies)
Three Test Outputs:
Output 1:
Signature of the faculty
EXERCISE:
1. Write a java program to print the multiplication table.
2. Write a java program to find the Factorial of a given integer using
recursive and nonrecursive functions
3. Write a java program that prompts the user for an integer and then
printouts all prime numbers up to that integer.

WEEK -2 Date:
Aim: Write a java program to multiply two given matrices.
public class MatrixEx
{
{
//creating two matrices
int a[][]={{1,1,1},{2,2,2},{3,3,3}};
int b[][]={{1,1,1},{2,2,2},{3,3,3}};
//creating another matrix to store the multiplication of two matrices
int c[][]=new int[3][3]; //3 rows and 3 columns
//multiplying and printing multiplication of 2 matrices
for(int i=0;i<3;i++)
{
for(int j=0;j<3;j++)
{
c[i][j]=0;
for(int k=0;k<3;k++)
{
c[i][j]+=a[i][k]*b[k][j];
} //end of k loop
System.out.print(c[i][j]+" "); //printing matrix element
} //end of j loop
System.out.println(); //new line
}
}
}
Three test outputs:
EXERCISE:
1. Write a java program to Transpose of a matrix is obtained by changing rows to cols & columns to
rows.
2. Write a java program to check whether the Matrix is Symmetric or Not.
3. Write a Java Program to find Matrix is an Identity Matrix or not.
4. Write a java program to add and subtract two given matrices.

R-20
WEEK -3 Date:
Aim: Write a java program for Method overloading and Constructor overloading
Method overloading:
import java.io.*;
class MethodOverloadingEx {
static int add(int a, int b)
{
return a + b;
}
static int add(int a, int b, int c)
{
return a + b + c;
}
{
System.out.println("add() with 2 parameters");
System.out.println(add(4, 6));
System.out.println("add() with 3 parameters");
System.out.println(add(4, 6, 7));
}
}
Output:

Constructor overloading
public class Student {
//instance variables of the class
int id;
String name;
Student(){
System.out.println("this a default constructor");
}
Student(int i, String n){
id = i;
name = n;
}
public static void main(String[] args) {
//object creation
Student s = new Student();
System.out.println("nDefault Constructor values: n");
System.out.println("Student Id : "+s.id + "nStudent Name : "+s.name);
System.out.println("nParameterized Constructor values: n");
Student student = new Student(10, "Kalpana");
System.out.println("Student Id : "+student.id + "nStudent Name : "+student.name);
}
}
Three test outputs:
EXERCISE:
1.Write a java program to find all even and odd integers up to a given integer.
2.Write a java program that reads a line of integers and displays each integers andthe
product of all integers use String Tokenizer.

R-20
WEEK - 4 Date:
Write a java program to display the employee details using Scanner class
import java.util.*;
class EmployeeDetails
{
{
System.out.println("enter name,id,age,salary");Scanner sc=new Scanner(System.in);
String n=sc.next();int i=sc.nextInt(); int a=sc.nextInt();
float s=sc.nextFloat();
System.out.println("name is"+n+"idis"+i+"ageis"+a+"salaryis"+s);
}
}
Three test Outputs:
EXERCISE:
1. Write a java program to Read and display the student details using Scannerclass.
2. Write a java program that displays the number of characters, lines, words,white spaces in
a text file.

WEEK - 5 Date:
Aim: Write a java program that checks whether a given string is palindrome or not
Program:
// Class to find whether string is palindrome or not.
class palindrome
{
{
// Accepting the string at run time.
String s=args[0];
String s1="";
int le,j;
// Finding the length of the string.
le = s.length();
// Loop to find the reverse of the string.
for(j=le-1;j>=0;j--)
{
s1=s1+s.charAt(j);
}
// Condition to find whether two strings are equal and display the message.
if(s.equals(s1))
System.out.println("String "+s+" is palindrome"); else
System.out.println("String "+s+" is not palindrome");
}
}
Three test outputs:
EXERCISE:
1. Write a java program to sort the given integers in ascending/descending order.
2. Write a java program to display characters in a string in sorted order.
3. Write a program that uses a sequence input stream to output the contents of two files.

R-20
WEEK – 6A Date:
Write a java program to represent Abstract class with example Program
abstract class Bank{
abstract int getRateOfInterest();
}
class SBI extends Bank
{
int getRateOfInterest()
{
return 7;
}
}
class PNB extends Bank
{
int getRateOfInterest(){return 8;}
}
class TestBank{
public static void main(String args[]){
Bank b;
b=new SBI();
System.out.println("Rate of Interest is: "+b.getRateOfInterest()+" %");
b=new PNB();
System.out.println("Rate of Interest is: "+b.getRateOfInterest()+" %");
}
}
Three Test Outputs:
EXERCISE:
Write a java program that reads a file and displays the file on the screen, with an asterisk
mark before each line

WEEK – 6B Date:
Write a java program to implement Interface using extends keyword
class Person
{
String name;
Person(String n)
{
name = "Person: " + n;
}
}
interface Mother
{
public void FeedChildren();
}
interface Wife
{
public void CallHusband();
}
class WifeAndMother extends Person implements Wife, Mother
{
WifeAndMother(String n)
{
super(n);
name = "Wife and mother: " + n;
}
public void FeedChildren()
{
System.out.println(name + " is feeding the children.");
}
public void CallHusband()
{
System.out.println(name + " is calling her husband.");
}
}
class Test
{
{
Person p = new Person("SreeRam");
WifeAndMother w = new WifeAndMother("Seetha");
System.out.println("p is a " + p.name + " ");
System.out.println("w is a " + w.name);
w.FeedChildren();
w.CallHusband();
} }

R-20
Three Test Outputs:
Output 1:

WEEK – 7A Date:
Write a java program to create inner classes
class A
{
int
a=10;
void
display(
)
{
B
b=new
B();
b.show(
);
}
class B
{
int
b=20;
void
show(
)
{
System.out.println(" a value is " +a);
System.out.println(" b value is " +b);
}
}
}
class InnerDemo
{
{
A
a=new
A( );
a.displa
y( );
}
}
Three Test Outputs:

R-20
WEEK – 7B Date:
Write a java program to create user defined package
A.java
package pack;
public class A
{
public void msg()
{
System.out.println("Hello");
}
}
B.java
import pack.A;
class B
{
{
A obj = new A();
obj.msg();
}
}
Three Test Outputs:

WEEK – 8A Date:
Write a java program for creating multiple catch blocks
public class MultipleCatchBlocks { public static void main(String[ ] args)
{
try
{
int a[ ]=new
int[5];
a[5]=30/0;
}
catch(ArithmeticException e)
{
System.out.println("Arithmetic Exception occurs");
}
catch(ArrayIndexOutOfBoundsException e)
{
System.out.println("ArrayIndexOutOfBounds Exception occurs");
}
catch(Exception e)
{
System.out.println("Parent Exception occurs");
}
System.out.println("rest of the code");
}
}
Three Test Outputs:

R-20
WEEK – 8B Date:
Write a java program for producer and consumer problem using Threads
class InterThreadDemo
{
{
Producer p1=new Producer();
Consumer c1=new Consumer(p1);
Thread t1=new Thread(p1);
Thread t2=new Thread(c1);
t2.start();
t1.start();
}
}
class Producer extends Thread
{
StringBuffer sb;
Producer()
{
sb=new StringBuffer();
}
public void run()
{
synchronized(sb)
{
for(int i=0;i<=10;i++)
{
try
{
sb.append(i+":");
Thread.sleep(1000);
System.out.println("appending");
}
catch(InterruptedException e)
{
System.out.println(e);
}
}
sb.notify();
}
}
}

class Consumer extends Thread
{
Producer prod;
Consumer(Producer prod)
{
this.prod=prod;
}
public void run()
{
synchronized(prod.sb)
{
try
{
prod.sb.wait();
}
catch(Exception e)
{
System.out.println(e);
}
System.out.println(prod.sb);
}
}
}
Three Test Outputs:

R-20
WEEK – 9 Date:
Write a Java program that implements a multi-thread application that has three
threads
class Thread1 extends Thread
{
public void run()
{
{
System.out.println("Thread1:"+ i);
}
}
}
{
public void run()
{
for(int j=0;j<=5;j++)
{
System.out.println("Thread2:"+ j);
}
}
}
{
public void run()
{
for(int k=0;k<=5;k++)
{
System.out.println("Thread3:"+ k);
} } }
class MultiThreadDemo
{
{
Thread1 t1=new
Thread1(); Thread2
t2=new Thread2();
Thread3 t3=new
Thread3();t1.start();
t2.start();
t3.start();
{
System.out.println("main thread:"+ i);
}
} }

Three Test Outputs:

R-20
WEEK – 10A Date:
Write a java program to display File class properties
import java.io.*;
public class FileDemo2 {
public static void main(String[] args)
{
String fname=args[0];
File f=new File(fname);
System.out.println("path: "+f.getPath());
System.out.println("parent: "+f.getAbsolutePath());
System.out.println("parent: "+f.getParent());
System.out.println("exits: "+f.exists());
if(f.exists())
{
System.out.println("isWritable: "+f.canWrite());
System.out.println("isReadable: "+f.canRead());
System.out.println("isDirectory: "+f.isDirectory());
System.out.println("size of the file: "+f.length());
}
}
}
Test Output:

WEEK – 10B Date:
Write a java program to represent ArrayList class
import java.util.*;
class TestJavaCollection
{
public static void main(String args[ ])
{
ArrayList<String> list=new ArrayList<String>(); //Creating arraylist
list.add("Kalpana"); //Adding object in arraylist
list.add("Venu");
list.add("Suneetha");
list.add("Gayatri");
//Traversing list through Iterator
Iterator itr=list.iterator();
while(itr.hasNext())
{
System.out.println(itr.next());
}
}
}
Test output:

R-20
WEEK – 10C Date:
Write a Java program loads phone no, name from a text file using hash table
Aim: Implement a program to display the content of a text file where the data is organized as
one line per record and each field in a record are separated by a whitespace (s means 0 or
more repetitions of any whitespace character. It takes a name or phone number as input and
prints the corresponding other value from the hash table.
Program:
import java.util.*;
import java.io.*;
public class Hashtbl {
{
try
{
FileInputStream fs = new FileInputStream("E:kalpanaph.txt");
Scanner sc = new Scanner(fs).useDelimiter("s+");
Hashtable<String, String> ht = new Hashtable<String, String>();
String[] arrayList;
String a;
System.out.println("HASH TABLE IS");
System.out.println("--------------------------");
System.out.println("KEY : VALUE");
while (sc.hasNext())
{
a = sc.nextLine();
arrayList = a.split("s+");
ht.put(arrayList[0], arrayList[1]);
System.out.println(arrayList[0] + ":" + arrayList[1]);
}
System.out.println("----MENU------");
System.out.println("----1.Search by Name------");
System.out.println("----2.Search by Mobile------");
System.out.println("----3.Exit------");
String opt = "";
String name, mobile;
Scanner s = new Scanner(System.in);
while (opt != "3")
{
System.out.println("Enter Your Option 1,2,3");
opt = s.next();

switch (opt)
{
case "1":
{
System.out.println("Enter Name");
name = s.next();
if (ht.containsKey(name))
{
System.out.println("Mobile is " + ht.get(name));
}
else
{
System.out.println("Not Found");
}
}
break;
case "2":
{
System.out.println("Enter mobile");
mobile = s.next();
if (ht.containsValue(mobile)) {
for (@SuppressWarnings("rawtypes") Map.Entry e : ht.entrySet()) {
if (mobile.equals(e.getValue())) {
System.out.println("Name is " + e.getKey());
}
}
}
else
{
System.out.println("Not Found");
}
}
break;
case "3":
{
opt = "3";
System.out.println("Menu Successfully Exited");
}
break;
default:
System.out.println("Choose Option betwen 1 and Three");
break;
} } }
catch (Exception ex) {
System.out.println(ex.getMessage());
} } }

R-20
Test output:

WEEK – 11 Date:
Write an applet program that displays a simple message
import java.awt.*;
import java.applet.*;
/*
<applet code="FirstApplet" width=200 height=300>
</applet>*/
public class FirstApplet extends Applet
{
public void init()
{
setBackground(Color.red);
}
public void paint(Graphics g)
{
g.drawString("this is first applet",50,30);
showStatus("welcome");
}
}
Three test outputs:

R-20
WEEK – 12A Date:
Write a Java program compute factorial value using Applet
import java.awt.*;
import java.awt.event.*;
/*
<applet code="FactorialApplet" width=300 height=300>
</applet>
*/
public class FactorialApplet extends Applet implements ActionListener
{
Label L1,L2;
TextField T1,T2;
Button B1;
public void init()
{
setLayout(new FlowLayout(FlowLayout.LEFT));
L1=new Label("enter the value");
add(L1);
T1=new TextField(10);add(T1);
L2=new Label("factorial value is");
add(L2);
T2=new TextField(10);add(T2);
B1=new Button("compute");
add(B1);
B1.addActionListener(this);
}
public void actionPerformed(ActionEvent e)
{
if(e.getSource()==B1)
{
int value=Integer.parseInt(T1.getText());
int fact=factorial(value);
T2.setText(String.valueOf(fact));
}
}
int factorial(int n)
{
if(n==0)return 1;else
return n*factorial(n-1);
}
}

Three test outputs:

R-20
WEEK – 12B Date:
Write a program for passing parameters using Applet
import java.awt.*; import java.applet.*;
/*
<applet code="MyApplet" width=200 height=300>
<param name="t1" value="Ravi">
<param name="t2" value="102">
</applet>
*/
public class MyApplet extends Applet
{
String n; String id;
public void init()
{
n=getParameter("t1");
id=getParameter("t2");
}
{
g.drawString("name is"+n,100,100);
g.drawString("id is"+id,100,150);
}
}
Three test outputs:

WEEK – 13A Date:
Write a java program for handling Mouse events
import java.awt.*;
/*
<applet code="MouseEvents" width=300 height=100>
</applet>
*/
public class MouseEvents extends Applet implements MouseListener, MouseMotionListener
{
String msg = "";
int mouseX = 0, mouseY = 0; // coordinates of mouse
public void init() {
addMouseListener(this);
addMouseMotionListener(this);
}
// Handle mouse clicked.
public void mouseClicked(MouseEvent me) {
// save coordinates
mouseX = 0;
mouseY = 10;
msg = "Mouse clicked.";
repaint();
}
// Handle mouse entered.
public void mouseEntered(MouseEvent me) {
// save coordinates
mouseX = 0;
mouseY = 10;
msg = "Mouse entered.";
repaint();
}
// Handle mouse exited.
public void mouseExited(MouseEvent me) {
// save coordinates
mouseX = 0;
mouseY = 10;
msg = "Mouse exited.";
repaint();
}

R-20
// Handle button pressed.
public void mousePressed(MouseEvent me) {
// save coordinates mouseX = me.getX();
mouseY = me.getY();
msg = "Down";
repaint();
}
// Handle button released.
public void mouseReleased(MouseEvent me) {
// save coordinates
mouseX = me.getX();
mouseY = me.getY();
msg = "Up";
repaint();
}
// Handle mouse dragged.
public void mouseDragged(MouseEvent me) {
// save coordinates
mouseX = me.getX();
mouseY = me.getY();
msg = "*";
showStatus("Dragging mouse at " + mouseX + ", " + mouseY);
repaint();
}
// Handle mouse moved.
public void mouseMoved(MouseEvent me)
{
// show status
showStatus("Moving mouse at " + me.getX() + ", " + me.getY());
}
// Display msg in applet window at current X,Y location.
{
g.drawString(msg, mouseX, mouseY);
}
}

Test outputs:

R-20

WEEK – 13B
Write a program for handling Key Events
import java.awt.*;
/*
<applet code="SimpleKey" width=300 height=100>
</applet> */
public class SimpleKey extends Applet implements KeyListener
{
String msg = "";
int X = 10, Y = 20; // output coordinates
public void init()
{
addKeyListener(this);
requestFocus(); // request input focus
}
public void keyPressed(KeyEvent ke)
{
showStatus("Key Down");
}
public void keyReleased(KeyEvent ke)
{
showStatus("Key Up");
}
public void keyTyped(KeyEvent ke)
{
msg += ke.getKeyChar();
repaint();
}
// Display keystrokes.
{
g.drawString(msg, X, Y);
}
}

R-20
Test outputs:

WEEK – 14 Date:
Aim: Write a java program that connects to a database using JDBC
Program:
import java.sql.Connection;
import java.sql.DriverManager;
public class PostgreSQLJDBC
{
{
Connection c = null;try
{
Class.forName("org.postgresql.Driver");
c = DriverManager .getConnection
("jdbc:postgresql://localhost:5432/testdb","postgres", "123");
} catch (Exception e)
{
e.printStackTrace();
System.err.println(e.getClass().getName()+": "+e.getMessage());System.exit(0);
}
System.out.println("Opened database successfully");
}
}
Three test outputs:

R-20
WEEK – 15A Date:
Write a java program to connect to a database using JDBC and insert values into it
import java.sql.Statement;
public class PostgreSQLJDBC
{
{
Connection c = null; Statement stmt = null;try {
Class.forName("org.postgresql.Driver");c = DriverManager
.getConnection("jdbc:postgresql://localhost:5432/testdb", "manisha", "123");
c.setAutoCommit(false); System.out.println("Opened database successfully");stmt =
c.createStatement();
String sql = "INSERT INTO COMPANY (ID,NAME,AGE,ADDRESS,SALARY) "
+ "VALUES (1, 'Paul', 32, 'California', 20000.00 );";
stmt.executeUpdate(sql);
sql = "INSERT INTO COMPANY (ID,NAME,AGE,ADDRESS,SALARY) "
+ "VALUES (2, 'Allen', 25, 'Texas', 15000.00);";
+ "VALUES (3, 'Teddy', 23, 'Norway', 20000.00);";
+ "VALUES (4, 'Mark', 25, 'Rich-Mond ', 65000.00);";
stmt.close();
c.commit();
c.close();
}
catch (Exception e)
{
System.err.println( e.getClass().getName()+": "+ e.getMessage());
System.exit(0);
}
System.out.println("Records created successfully");
}
}

Three test outputs:

R-20
WEEK – 15B Date:
Write a java program to connect to a database using JDBC and delete values from it
import java.sql.ResultSet;
import java.sql.Statement;
public class PostgreSQLJDBC6 { public static void main( String args[ ] )
{
Connection c = null;
Statement stmt = null;
try {
Class.forName("org.postgresql.Driver");
c = DriverManager.getConnection
("jdbc:postgresql://localhost:5432/testdb", "manisha", "123");
c.setAutoCommit(false);
System.out.println("Opened database successfully");
stmt = c.createStatement();
String sql = "DELETE from COMPANY where ID=2;";
c.commit();
ResultSet rs = stmt.executeQuery( "SELECT * FROM COMPANY;");
while ( rs.next( ) )
{
int id = rs.getInt("id");
String name = rs.getString("name");
int age = rs.getInt("age");
String address = rs.getString("address");
float salary = rs.getFloat("salary");
System.out.println( "ID = " + id );
System.out.println( "NAME = " + name );
System.out.println( "AGE = " + age );
System.out.println( "ADDRESS = " + address );
System.out.println( "SALARY = " + salary );
System.out.println();
}
rs.close();
stmt.close();
c.close();
}

catch ( Exception e )
{
System.err.println( e.getClass().getName()+": "+ e.getMessage());
System.exit(0);
}
System.out.println("Operation done successfully");
}
}
Three test outputs:

R-20
WEEK – 16
Date:
Write a java program that works as a simple calculator. Use a Grid Layout to arrange
Buttons for digits and for the + - * % operations. Add a text field to display the result
import javax.swing.*;
import javax.swing.event.*;
import java.awt.*;
class A extends JFrame implements ActionListener
{
public JButton b1, b2, b3, b4, b5, b6, b7, b8, b9, b10, b11, b12, b13, b14, b15, b16;
public JTextField tf1;
public JPanel p;
public String v = "";
public String v1 = "0";
public String op = "";
public A( )
{
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
setSize(400, 400);
p = new JPanel(new FlowLayout());
tf1 = new JTextField(10);
p.add(tf1);
add(p);
setLayout(new GridLayout(0, 3));
b1 = new JButton("1");
b1.addActionListener(this);
add(b1);
add(b2);
add(b3);
add(b4);

add(b5);
add(b6);
add(b7);
add(b8);
add(b9);
add(b10);
b11 = new JButton("+");
add(b11);
b12 = new JButton("-");
add(b12);
b13 = new JButton("*");
add(b13);
b14 = new JButton("/");
add(b14);
b16 = new JButton("%");
add(b16);
b15 = new JButton("=");
add(b15);
setVisible(true);
}

R-20
public void actionPerformed(ActionEvent ae)
{
String b = ae.getActionCommand();
switch (b)
{
case "1":
{
v = v + "1";
tf1.setText(v);
}
break;
case "2": {
v = v + "2";
tf1.setText(v);
}
break;
case "3": {
v = v + "3";
tf1.setText(v);
}
break;
case "4": {
v = v + "4";
tf1.setText(v);
}
break;
case "5": {
v = v + "5";
tf1.setText(v);
}
break;
case "6": {
v = v + "6";
tf1.setText(v);
}
break;

case "7": {
v = v + "7";
tf1.setText(v);
}
break;
case "8": {
v = v + "8";
tf1.setText(v);
}
break;
case "9": {
v = v + "9";
tf1.setText(v);
}
break;
case "0": {
v = v + "0";
tf1.setText(v);
}
break;
case "+": {
op = "+";
v1 = tf1.getText();
v = "";
}
break;
case "-": {
op = "-";
v1 = tf1.getText();
v = "";
}
break;
case "*": {
op = "*";
v1 = tf1.getText();
v = "";
}

R-20
break;
case "/": {
op = "/";
v1 = tf1.getText();
v = "";
}
break;
case "%": {
op = "%";
v1 = tf1.getText();
v = "";
}
break;
case "=": {
switch (op) {
case "+": {
v = tf1.getText();
if (v.equals("")) {
v = "0";
}
long i = Long.parseLong(v1) + Long.parseLong(v);
tf1.setText(String.valueOf(i));
v="";
}
break;
case "-": {
v = tf1.getText();
if (v.equals("")) {
v = "0";
}
long i = Long.parseLong(v1) - Long.parseLong(v);
v="";
}
break;

case "*": {
v = tf1.getText();
if (v.equals("")) {
v = "0";
}
long i = Long.parseLong(v1) * Long.parseLong(v);
v="";
}
break;
case "/": {
try {
v = tf1.getText();
if (v.equals("")) {
v = "0";
}
long i = Long.parseLong(v1) / Long.parseLong(v);
v="";
} catch (Exception ex) {
JOptionPane.showMessageDialog(this, ex.getMessage());
}
}
break;
case "%": {
try {
v = tf1.getText();
if (v.equals("")) {
v = "0";
}
long i = Long.parseLong(v1) % Long.parseLong(v);
v="";
} catch (Exception ex) {
JOptionPane.showMessageDialog(this, ex.getMessage());
}
}

R-20
break;
}
}
break;
}
}
}
public class Calc
{
{
A a = new A();
}
}

Test outputs:

Lab Manual Object Oriented Programming through JAVA.pdf

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