The Primitive Types : Data Type Introduction « Data Type « Java Tutorial

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Java Tutorial » Data Type » Data Type Introduction

2. 1. 1. The Primitive Types

Java has eight primitive types of data: byte, short, int, long, char, float, double, and boolean.

These can be put in four groups:

Integers includes byte, short, int, and long
Floating-point numbers includes float and double
Characters includes char, like letters and numbers.
Boolean includes boolean representing true/false values.


byte



     The smallest integer type

     a range from -128 to 127. 

     useful when working with a stream of data from a network or file. 

     Byte variables are declared by use of the byte keyword. 



     byte b, c;



int



    The most commonly used integer type

    a signed 32-bit type 

    Ranging from -2,147,483,648 to 2,147,483,647

    used to control loops and to index arrays. 

    the most efficient type



long



   a signed 64-bit type

2. 1. Data Type Introduction
	2. 1. 1.	The Primitive Types
	2. 1. 2.	Size for Java's Primitive Types
	2. 1. 3.	Default values for primitives and references
	2. 1. 4.	Literals
	2. 1. 5.	Surprise! Java lets you overflow
	2. 1. 6.	Wrapping a Primitive Type in a Wrapper Object: boolean, byte, char, short, int, long, float, double
	2. 1. 7.	Print the limits of primitive types (e.g. byte, short, int ...) in Java
	2. 1. 8.	Get the minimum and maximum value of a primitive data types
	2. 1. 9.	Shows default initial values
	2. 1. 10.	Primitive utilities
	2. 1. 11.	Return primitive type the passed in wrapper type corresponds to

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