Java data type (basic data type) learning

Java data type (basic data type) learning

As with other languages, Java programming also exists, such as int a,float B. I have to understand the Java data type before I can learn the variables.

The data types of Java include basic data types and reference data types. Specific as follows:

The value ranges for each data type are as follows:

type name	keyword	occupied bytes	value range
byte-type	byte	1	-2^7~2^7-1
Span style= "font-size:10pt" > short integer	short	2	-2^15~2^15-1
integer	int	4	-2^31~-2^31-1
Span style= "font-size:10pt" > long int	long	8	-2^63~-2^63-1
single precision floating-point type	float	4	-3.4e38~3.4e38
Span style= "font-size:10pt" > double precision floating-point type	double	8	-1.7e308~1.7e308
character type	char	2	0~65535
Boolean type	Boolean	1	True or False

The range of values for each type can also be tested like this:

2. Public class javatest2{
4. Public Static void Main (string[] args) {
6. System.out.println (byte.max_value+ "" +byte.min_value);
8. System.out.println (short.max_value+ "" +short.min_value);
10. System.out.println (integer.max_value+ "" +integer.min_value);
12. System.out.println (long.max_value+ "" +long.min_value);
14. System.out.println (float.max_value+ "" +float.min_value);
16. System.out.println (double.max_value+ "" +double.min_value);
18. }
20. }

Java data type (basic data type) learning