Java基本数据类型详解-优快云博客

本文详细介绍了Java中的基本数据类型，包括整型(int、long、short、byte)、浮点型(float、double)、字符型(char)等，并提供了每种类型的字节数、位数、最大值和最小值。此外，还附带了Java代码示例，帮助读者更好地理解和掌握这些基本数据类型的使用。

java 基本数据类型

类型(datatype)	字节(byte)	位数(bit)	最大值(max_value)	最小值(min_value)
int	4	32	2147483647	-2147483648
long	8	64	9223372036854775807	-9223372036854775808
short	2	16	32767	-32768
char	2	16	\uFFFF	\u0000
float	4	32	3.4028235E38	1.4E-45
double	8	64	1.7976931348623157E308	4.9E-324
byte	1	8	127	-128
boolean

char类型

NOTE:存储的是字符只有取值范围

boolean类型

NOTE:这个需要额外讨论

代码示例

package com.devil.java.datatype;

public class DataTypeMain {

    public static void main(String[] args) {

        System.out.println(".......................................");
        System.out.println("int: " + Integer.SIZE);
        System.out.println("max_calue: " + Integer.MAX_VALUE);
        System.out.println("min_value: " + Integer.MIN_VALUE);
        System.out.println(".......................................");
        System.out.println("long: " + Long.SIZE);
        System.out.println("max_calue: " + Long.MAX_VALUE);
        System.out.println("min_value: " + Long.MIN_VALUE);
        System.out.println(".......................................");
        System.out.println("short: " + Short.SIZE);
        System.out.println("max_calue: " + Short.MAX_VALUE);
        System.out.println("min_value: " + Short.MIN_VALUE);
        System.out.println(".......................................");
        System.out.println("char: " + Character.SIZE);
        System.out.println("max_calue: " + Character.MAX_VALUE);
        System.out.println("min_value: " + Character.MIN_VALUE);
        System.out.println(".......................................");
        System.out.println("float: " + Float.SIZE);
        System.out.println("max_calue: " + Float.MAX_VALUE);
        System.out.println("min_value: " + Float.MIN_VALUE);
        System.out.println(".......................................");
        System.out.println("double: " + Double.SIZE);
        System.out.println("max_calue: " + Double.MAX_VALUE);
        System.out.println("min_value: " + Double.MIN_VALUE);
        System.out.println(".......................................");
        System.out.println("byte: " + Byte.SIZE);
        System.out.println("max_calue: " + Byte.MAX_VALUE);
        System.out.println("min_value: " + Byte.MIN_VALUE);
        System.out.println(".......................................");
    }

}

输出结果

.......................................
int: 32
max_calue: 2147483647
min_value: -2147483648
.......................................
long: 64
max_calue: 9223372036854775807
min_value: -9223372036854775808
.......................................
short: 16
max_calue: 32767
min_value: -32768
.......................................
char: 16
max_calue: 
min_value: 
.......................................
float: 32
max_calue: 3.4028235E38
min_value: 1.4E-45
.......................................
double: 64
max_calue: 1.7976931348623157E308
min_value: 4.9E-324
.......................................
byte: 8
max_calue: 127
min_value: -128
.......................................