This document provides an introduction to Java, including its history, uses, features, data types, operators, control statements, arrays, and functions. Java is an object-oriented programming language created in 1995 that is commonly used for enterprise applications, Android development, and desktop applications. It is platform independent, supports multithreading and automatic memory management, and has features like classes, inheritance, and polymorphism.

1. Java
Introduction to java.

2. Introduction to Java.
1. Java is a class based object oriented programming language.
2. Java was designed by james gosling.
3. It was released in the year 1995.
4. Current version of java Java SE15.0.2

3. Why Java ?

4. 1. Java is used for Enterprise application development.
2. Android development.
3. Desktop application development.
4. Games development.

5. Features of Java
1. Simple and easy to learn
2. Object oriented
3. Robust - automatic garbage collection and simple memory management
4. High performance
5. Supports multithreading
6. Platform independent

6. Introduction to Eclipse IDE

7. How code gets compiled in java.

8. Java is platform independent

9. Data types in java
Data types Default value Default size
byte 0 1
short 0 2
int 0 4
long oL 8
float 0.0f 4
double 0.0d 8
char ‘/v0000’ 2
boolean false 1 bit

10. Operators in java
Java supports following types of operators.
1. Arithmetic operators
2. Comparison operators
3. Logical operators
4. Assignment operators
5. Conditional or Ternary operators

11. Control statements
Control statements are used to control flow of execution.
1. If statement
2. Switch statement
Looping statements:
a) For
b) While
c) Do while

12. Arrays
Array is a group of like type varibles that are referred by common name.
Syntax to declare Array in java :
1. dataType[] arr; (or)
2. dataType arr[];
Initilization of Array in java:
1. Int arr[] = new int[5];

13. Functions
It is a block of code defined to perform operation or task.
Function has 2 parts
1. Function declaration
2. Function definition or body
Syntax:
Access specifier return type function name {
}
example:
public void myFunction() {
}