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What are the eight basic data types of java?

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Release： 2020-07-15 17:55:27

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The eight basic data types of Java are: byte (bit), short (short integer), int (integer), long (long integer), float (single precision), double (double precision) , char (character), boolean (Boolean value).

What are the eight basic data types of java?

About Java’s 8 basic data types, their names, digits, default values, value ranges and examples are shown in the following table:

##1byte(bit)80 -2^7 - 2^7-1byte b = 10;2short(short integer)16##320-2^ 31 - 2^31-1int i = 10;long(long integer)64float(single precision)##0 - 2^16-1char c = 'c';8boolean(Boolean value) 8false

Serial number	##Data type	Number of digits	Default value	Value range	Examples

		##0	-2^ 15 - 2^15-1	##short s = 10;	##3
int(integer)					4
	##0	-2 ^63 - 2^63-1	long l = 10l;		5
32	##0.0	- 2^31 - 2^31-1	##float f = 10.0f;	6	double(double)
64	0.0	-2^63 - 2^63-1	double d = 10.0d;
##7	char (character)	16	empty
			##true, false	boolean b = true;

##In order to verify the contents of the form, run the verification code in eclipse as follows :

package com.ce.test;

class Test {
    static byte b;
    static short s;
    static int i;
    static long l;
    static float f;
    static double d;
    static char c;
    static boolean bo;

    public static void main(String[] args) {

      System.out.println("byte的大小："+Byte.SIZE
              +";默认值："+b
              +";数据范围："+Byte.MIN_VALUE+" - "+Byte.MAX_VALUE);

      System.out.println("short的大小："+Short.SIZE
              +";默认值："+s
              +";数据范围："+Short.MIN_VALUE+" - "+Short.MAX_VALUE);

      System.out.println("int的大小："+Integer.SIZE
              +";默认值："+i
              +";数据范围："+Integer.MIN_VALUE+" - "+Integer.MAX_VALUE);

      System.out.println("long的大小："+Long.SIZE
              +";默认值："+l
              +";数据范围："+Long.MIN_VALUE+" - "+Long.MAX_VALUE);

      System.out.println("float的大小："+Float.SIZE
              +";默认值："+f
              +";数据范围："+Float.MIN_VALUE+" - "+Float.MAX_VALUE);

      System.out.println("double的大小："+Double.SIZE
              +";默认值："+d
              +";数据范围："+Double.MIN_VALUE+" - "+Double.MAX_VALUE);

      System.out.println("char的大小："+Character.SIZE
              +";默认值："+c
              +";数据范围："+Character.MIN_VALUE+" - "+Character.MAX_VALUE);

      System.out.println("boolean的大小："+Byte.SIZE
              +";默认值："+bo
              +";数据范围："+Byte.MIN_VALUE+" - "+Byte.MAX_VALUE);

    }
}

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The output result on the console is as shown below:

Why is the data range of char output here? Not 0 - 65535?

The char type in Java is represented by two bytes, that is, sixteen bits. Because it is an unsigned number, it is 2 to the 16th power, and the value range is: 0 - 2^16-1;

What are the eight basic data types of java?

Serial number

##Data type

Number of digits

Default value

Value range

Examples