Loading
JAVA
SPRING
ANGULAR
SQL
HTML
CSS
JAVASCRIPT
Data Structure
Java First Program
Java Variable
Data Types
Operators
Keywords and Identifiers
Modifier
Java-Methods
Final Keyword
Static Keyword
Constructor
if-else
Switch case
do-while Loop
While Loop
for loop
break
continue
Object and Class
Inheritance
Types of Inheritance
Encapsulation
Abstraction
Polymorphism
Java Overloading
Java Overriding
Type casting Overview
Arrays Overview
String overview
Java collection
List
ArrayList
LinkedList
HashSet
LinkedHashSet
TreeSet
Comparable and Comparator Interface
Generics
Map Interface overview
HashMap
TreeMap
HashTable
Cursors in Java
Types of Exception
Exception
Exception hierarchy
throw and throws keyword
Custom exception
Multitasking
Thread
Constructors and Methods
Introduction to JDBC
CRUD operations
JDBC Architecture
Exercise: 1 Exercise: 2 Exercise: 3 Exercise: 4 Exercise: 5

Exercise Number: 1

Q. Create an abstract class Shape with an abstract method area(). Then, create a subclass Circle that implements the area() method. Instantiate a Circle object and call area().