Primitive types - - Lecture notes

Primitive types

Figure 107. Java types

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Figure 108. Java primitive types, Part 1

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Name	Bytes	Type	Range	Literal samples
`byte`	1	Signed integer	$[- 2^{7}, 2^{7} - 1]$	-
`short`	2	Signed integer	$[- 2^{15}, 2^{15} - 1]$	-
`int`	4	Signed integer	$[- 2^{31}, 2^{31} - 1]$	0, 1, +1, -42, 0b1101, 017, 0xC
`long`	8	Signed integer	$[- 2^{63}, 2^{63} - 1]$	0L, 1L, +1L, -42L, 0b1101L, 017L, 0xCL

Figure 109. Java primitive types, Part 2

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Name	Bytes	Type	Range	Literal samples
`char`	2	Unsigned integer	$[0, 2^{16} - 1]$	'A', '*', '-', 'Ç', '⇶' ...
`float`	4	Floating point	$\pm 1.18 \times 10^{- 38}$ to $\pm 3.4 \times 10^{38}$	3.14f, 0.022f, -3.4E-24f
`double`	8	Floating point	$\pm 2.23 \times 10^{- 308}$ to $\pm 1.8 \times 10^{308}$	3.14, 0.022, -3.4E-24, 3.14d,...
`boolean`	?	Logical value	not applicable	`true`, `false`

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