How many bytes (bits) do each data type in java occupy?

There are 8 basic data types in Java: byte, int, short, long, boolean, char, float, double

The corresponding classes are: Byte, Int , Short, Long, Boolean, Charecter, Float, Double

Among them: boolean is a logical type, char is a text type, byte, short, int, and long are integer types, and float and double are floating point types

byte: 1 byte-128~127

short: 2 bytes-2^15~2^15-1

int: 4 bytes-2^31~ 2^31-1

long: 8 bytes -2^63~2^63-1

boolean: 1 byte true false (cannot be replaced by 0 or non-0 in java)

float: 4 bytes -3.403E38~3.403E38

double: 8 bytes -1.798E308~- 4.9E324

char: 2 bytes '\u0000' ~' '\uffff '(hexadecimal, converted to 0~65535)

(1 byte equals 8 bits)

java learning video recommendation: java introductory learning

Example:

package com.Howard.test01;
/**
 * java基本数据类型的字节、取值范围
 * 由于java.lang.Boolean没用提供size方法，
 * 所以这里只具体列出了8种基本数据类型中的7种
 * @author Howard
 * 2017年2月24日
 */
public class BasicDataTypeTest {
 
	public static void main(String[] args) {
		System.out.println(Integer.TYPE+":"+Integer.SIZE
				+"  "+Integer.MIN_VALUE+"~"+Integer.MAX_VALUE);
		System.out.println(Short.TYPE+":"+Short.SIZE
				+"  "+Short.MIN_VALUE+"~"+Short.MAX_VALUE);
		System.out.println(Byte.TYPE+":"+Byte.SIZE
				+"  "+Byte.MIN_VALUE+"~"+Byte.MAX_VALUE);
		System.out.println(Long.TYPE+":"+Long.SIZE
				+"  "+Long.MIN_VALUE+"~"+Long.MAX_VALUE);
		System.out.println(Character.TYPE+":"+Character.SIZE
				+"  "+(int)Character.MIN_VALUE+"~"+(int)Character.MAX_VALUE);
		System.out.println(Float.TYPE+":"+Float.SIZE
				+"  "+Float.MIN_VALUE+"~"+Float.MAX_VALUE);
		System.out.println(Double.TYPE+":"+Double.SIZE
				+"  "+Double.MIN_VALUE+"~"+Double.MAX_VALUE);
	}
}

Run result:

##More java related article recommendations:

Introduction to java development

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