1. Create a Java program that demonstrates the concept of classes and objects by modeling dogs with different names and breeds //Classes and Objects class Dog { String name; // Attribute String breed; // Attribute // Method void bark() { System.out.println(name + " barks!"); } } public class Main { public static void main(String[] args) { Dog myDog = new Dog(); // Creating an object named myDog myDog.name = "Buddy"; // Setting attribute values myDog.breed = "Golden Retriever"; Dog anotherDog = new Dog(); // Creating another object anotherDog.name = "Lucy"; anotherDog.breed = "Labrador"; // Calling methods on objects myDog.bark(); anotherDog.bark(); } } 2. Write a Java program using BufferedReader to read a string, an integer, a float, and a boolean value from the user and display them. import java.io.*; class Main { public static void main(String[] args)throws IOException { BufferedReader br= new BufferedReader(new InputStreamReader(System.in)); System.out.println("enter name"); String a=br.readLine(); System.out.println("enter Integer No"); int i=Integer.parseInt(br.readLine()); System.out.println("enter Float No"); float f=Float.parseFloat(br.readLine()); System.out.println("enter boolean value"); boolean b=Boolean.parseBoolean(br.readLine()); System.out.println(a); System.out.println(i); System.out.println(f); System.out.println(b); } } 3. Write a Java program to demonstrate data abstraction using an abstract class and subclasses //Data Abstraction abstract class Animal { // Abstract method (does not have a body) public abstract void makeSound(); // Regular method public void sleep() { System.out.println("Zzz..."); } } // Subclass (inherited from Animal) class Dog extends Animal { @Override public void makeSound() { System.out.println("Woof"); } } // Subclass (inherited from Animal) class Cat extends Animal { @Override public void makeSound() { System.out.println("Meow"); } } // Use the abstract class class Main { public static void main(String[] args) { Animal dog = new Dog(); Animal cat = new Cat(); dog.makeSound(); // Output: Woof dog.sleep(); // Output: Zzz... cat.makeSound(); // Output: Meow cat.sleep(); // Output: Zzz... } } 4. Write a Java program to calculate the area of a rectangle using the concept of encapsulation. // ENCAPSULATION class Area { // fields to calculate area int length; int breadth; // constructor to initialize values Area(int length, int breadth) { this.length = length; this.breadth = breadth; } // method to calculate area public void getArea() { int area = length * breadth; System.out.println("Area: " + area); } } class Main { public static void main(String[] args) { // create object of Area // pass value of length and breadth Area rectangle = new Area(5, 6); rectangle.getArea(); } } 5. Write a Java program to demonstrate polymorphism by creating a superclass Polygon and its subclasses Square and Circle, each having their own implementation of the render() method. //Polymorphism class Polygon { // method to render a shape public void render() { System.out.println("Rendering Polygon..."); } } class Square extends Polygon { // renders Square public void render() { System.out.println("Rendering Square..."); } } class Circle extends Polygon { // renders circle public void render() { System.out.println("Rendering Circle..."); } } class Main { public static void main(String[] args) { // create an object of Square Square s1 = new Square(); s1.render(); // create an object of Circle Circle c1 = new Circle(); c1.render(); } } 6. Write a Java program using the Scanner class to read an integer and a string from the user and display them together in a formatted message. import java.util.Scanner; public class ScannerDemo { public static void main(String args[]) { Scanner scanner = new Scanner(System.in); System.out.println("Enter a number:"); int a = scanner.nextInt(); System.out.println("Enter your name:"); String nm=scanner.next(); System.out.printf(nm + " you entered : " + a); } } 7. Write a Java program to demonstrate inheritance. //Inheritance class Animal { void eat() { System.out.println("Animal is eating"); } } // Subclass class Dog extends Animal { void bark() { System.out.println("Dog is barking"); } } public class Main { public static void main(String[] args) { Dog myDog = new Dog(); myDog.eat(); // Output: Animal is eating myDog.bark(); // Output: Dog is barking } } 8. Write a Java program to demonstrate the use of both parameterized and default constructors. public class Main { int num1; int num2; // Creating parameterized constructor Main(int a, int b) { num1 = a; num2 = b; } public static void main(String[] args) { // Creating two objects by passing the values // to initialize the attributes. // parameterized constructor will invoke Main obj1 = new Main(10, 20); Main obj2 = new Main(100, 200); // Printing the objects values System.out.println("obj1"); System.out.println("num1 : " + obj1.num1); System.out.println("num2 : " + obj1.num2); System.out.println("obj2"); System.out.println("num1 : " + obj2.num1); System.out.println("num2 : " + obj2.num2); } } 9. Write a Java program to demonstrate multiple inheritance in Java using interfaces. public class Tester{ public static void main(String[] args){ // creating instance of hockey Hockey hockey = new Hockey() { // implementing the methods of interfaces public void start() { System.out.println("Start Event"); } public void play() { System.out.println("Play Sports"); } public void show() { System.out.println("Show Hockey"); } }; // calling the methods using instance hockey.start(); hockey.play(); hockey.show(); } } interface Event { // interface 1 public void start(); } interface Sports { // interface 2 public void play(); } // another interface extending 1st and 2nd interface interface Hockey extends Sports, Event{ public void show(); } 10. Write a Java program to demonstrate the use of the throw keyword. public class Main { static void checkAge(int age) { if (age < 18) { throw new ArithmeticException("Access denied - You must be at least 18 years old."); } else { System.out.println("Access granted - You are old enough!"); } } public static void main(String[] args) { checkAge(15); } } 11. Create an HTML form that collects a user’s first name, last name, favorite programming language using radio buttons, and owned vehicles using checkboxes, and includes a submit button. Html Forms 12. Create an HTML page that displays a table with columns for Firstname, Lastname, and Age, and includes at least three rows of data. HTML tables

Firstname	Lastname	Age
Priya	Sharma	24
Arun	Singh	32
Seema	Kadam	41

13. Program based on Document Object Model to change the background color of the web page automatically after every 5 seconds. Auto Background Color Changer

Background Color Changes Every 5 Seconds

14. Create an HTML page using inline styles. Inline Stylesheets Demo

A Blue Heading

A red paragraph.

15. Create an HTML page that demonstrates both ordered and unordered lists. HTML Lists

Welcome To Lists in HTML

Example of Unordered list

Programming Languages
Data Structures & Algorithm
Web Technology
Aptitude & Logical Reasoning

Example of Ordered List

Programming Languages

C Programming
Python Programming
Java Programming
Servlets
JSP

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