Primitive Data Types

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Overview
Primitive Data Types Listing

We create objects from classes (Java's classes and classes we have created). These classes and objects will generally handle most of our coding needs.

Java, however, does have a special type of data called primitives.

Primitives are not proper objects -- we cannot send messages to them, e.g. aPrim.toString() is not allowed.

Primitives are useful when operators are utilized (we'll learn about operators next).

Primitive Data Types Listing

Type	Contains	Default	Size	Range
int	Signed integer	0	32 bits	-2147483648 to 2147483647
double	IEEE 754 floating point	0	64 bits	+/-4.9E-324 to +/-1.7976931348623157E+308
boolean	true or false	false	1 bit	true of false
char	Unicode character	\u0000	16 bits	U+0000 to U+FFFF
byte	Signed integer	0	8 bits	-128 to 127
short	Signed integer	0	16 bits	-32768 to 32767
long	Signed integer	0	64 bits	-9223372036854775808 to 9223372036854775807
float	IEEE 754 floating point	0	32 bits	+/-1.4E-45 to +/-3.4028235E+38

We're already familiar with int, double and boolean.

Introduction To Objects With Java (Chapter 601 - Primitive Data)

Chapter 601 - Primitive Data Primitive Data Types

Contents Intro Prims Core Operators Advanced Operators Gotcha Examples

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