[프로그래밍언어][Java(자바)] 자료형, 변수형, 데이터 타입 - 종류, 크기, 범위

 

https://www.javatpoint.com/java-data-types

http://tcpschool.com/java/java_datatype_basic

 

<  Data Type  >

 

• Primitive
  • Boolean
    • boolean
  • Numeric
    • Character
      • char
    • Integral
      • Integer
        • byte
        • short
        • int
        • long
      • Floating-point
        • float
        • double
• Non-Primitive
  • Classes
  • Interfaces
  • Arrays
  • etc.

 

Data Type	Default size	Data Range	Default Value
boolean	1 bit	true 또는 false	false
char	2 byte	0 ~ 2^16	'\u0000'
byte	1 byte	-2^7 ~ (2^7 - 1) -128 ~ 127	0
short	2 byte	-2^15 ~ (2^15 - 1) -32,768 ~ 32,767	0
int	4 byte	-2^31 ~ (2^31 - 1) -2,147,483,648 ~ 2,147,483,647	0
long	8 byte	-2^63 ~ (2^63 - 1) -9,223,372,036,854,775,808 ~ 9,223,372,036,854,775,807	0L
float	4 byte	(3.4 X 10^(-38)) ~ (3.4 X 10^38)	0.0f
double	8 byte	(1.7 X 10^(-308)) ~ (1.7 X 10^308)	0.0d