Читать книгу OCP Oracle Certified Professional Java SE 17 Developer Study Guide - Jeanne Boyarsky - Страница 93

The Primitive Types

The exam assumes you are well versed in the eight primitive data types, their relative sizes, and what can be stored in them. Table 1.6 shows the Java primitive types together with their size in bits and the range of values that each holds.

TABLE 1.6 Primitive types

Keyword	Type	Min value	Max value	Default value	Example
`boolean`	`true` or `false`	n/a	n/a	`false`	`true`
`byte`	8-bit integral value	-128	127	`0`	`123`
`short`	16-bit integral value	-32,768	32,767	`0`	`123`
`int`	32-bit integral value	-2,147,483,648	2,147,483,647	`0`	`123`
`long`	64-bit integral value	-2⁶³	2⁶³ – 1	`0L`	`123L`
`float`	32-bit floating-point value	n/a	n/a	`0.0f`	`123.45f`
`double`	64-bit floating-point value	n/a	n/a	`0.0`	`123.456`
`char`	16-bit Unicode value	0	65,535	`\u0000`	`'a'`

OCP Oracle Certified Professional Java SE 17 Developer Study Guide

Подняться наверх