This document discusses key concepts in Java including data types, variables, operators, and input/output. It covers primitive data types like integers and floating-point numbers. It also discusses initializing and naming variables, relational and boolean operators, built-in string and math methods, and using Scanner and print statements for input and output. The overall purpose is to provide an overview of fundamental Java concepts.

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Java

2. The Way Java Work

3. IDE
• NetBeans

4. IDE ( continue )
• Eclipse

5. Java Hello World ! 

6. Data Type
• Java is a strongly typed language. This means
that every variable must have a declared type.
There are eight primitive types in Java. Four of
them are integer types; two are floating-point
number types .. Integers are :

7. Data Type ( continue )
• Floating Numbers are :
The floating-point types denote numbers
with fractional parts. The two floating-
point are :

8. Data Type ( continue )
• The char Type :

9. Initializing Variables
• Java Case Sensitive .
• How To Rename Variables ..
• java Conventions .
• Increment and Decrement Operators .
• Relational and boolean Operators .
( == , != , && , || )
• Concatenation .

10. Built In Method !
• String Method …
• Math Method …
• Every Internal Method help you to make your
task quickly :D

11. Input / Output
• Reading Input ( Scanner ) .
Scanner in = new Scanner(System.in);
System.out.print("What is your name? ");
String name = in.nextLine();
• Output .. “ System.out.pritnln();