Java data type, java Basic Data Type

Java data type, java Basic Data Type
I. Java Data Type

1. Basic data type

2. Reference Data Type

Ii. Basic Data Types
1. Integer type: bytr, short, int, long
2. Floating Point Data Types: float and double
3. Character Type: char
4. boolean type: bollean

Type name byte space type description
Byte 1-byte (8-bit) Stores 1-byte data
Short 2-byte (16-bit) Compatibility considerations, generally not used
Int 4-byte (32-bit) Storage INTEGER (commonly used)
Long 8-byte (64-bit) storage of long integers (commonly used)
Float 4-byte (32-bit) storage of Floating Point Numbers
Double 8-byte (64-bit) storage double-precision floating point number
Char 2-byte (16-bit) storage of one byte
Boolean 1-byte (8-bit) Storage logic variable

 

Step: a. Declare the variable (int I ;)
B. assign values (I = 1;) or ------ int I = 1;
C. Use Variables

 

A. The default Integer type is int.
B. to define data of the long type, add l or L to the data
C. The default value of the floating point type is double.
D. Define float data. f or F must be added to the data.
E. When double is used, d or D can be added to the backend, which is generally omitted.
F. char indicates the character type. Data should be placed in ''when values are assigned.

* Note: String is not of the data type.