Notes

#JAVA
JAVA is a high level language.
Sun Microsystems desinged it in early 1990
JAVA is platform independent means Write Once Run Anywhere.
JAVA is Robust,Portable and Dynamic, with ability to fit virtually with any type of application.
JAVA is running on more than 3 Billion Devices.

> JAVA First Program:
class My Class{
public static void main(String[] args) {
System.Out.Println("Hello World");
}
}
In JAVA code in the class can only run.
main is Method whereas public and static are the Keywords

>main Method:
-public: anyone can access it
-static: method can be run without creating an instance of the class containing the main method
-void: method doesn't return any value
-main: the name of the method
main Method is array of strings called args.

>System.Out.Println():
The println method prints a line of text to the screen.
The System class and its out stream are used to access the println method.

>Semicolons in JAVA:
In JAVA, each statement must end with a semicolon(;).

>Comments:
-A Single-line comment starts with two forward slashes.
// This is a single-line comment
-A Multi-line comment froward slash and asterisk(star) and ends with asterisk(star) and forward slash.
/* This is a Multi-line comment */

>Variables
Variables are used to store the data for processing.
-int: Used for integers such as (123,-58)
-double: Used for floating-point and number with decimal such as (3.1456/-66.98)
-String: Used for text such as ("Hello","Good Morning")
-char: Used for single character such as ('A')
-boolean: Used for possibility kind of things such as (true,false)

>Getting User Input
first we have import the hadder file
import java.util.Scanner;
In order to use the Scanner class, create an instance of the class by this syntax
Scanner myVar = new Scanner(System.in);
Scanner class can read inputs of user
Some methods of Scanner class:
Read a byte - nextByte()
Read a short - nextShort()
Read a int - nextInt()
Read a long - nextLong()
Read a float - nextFloat()
Read a double - nextDouble()
Read a boolean - nextBoolean()
Read a complete line - nextLine()
Read a word - next()