How much do you know about the basic data types that must be understood in Java development?

Every developer who has just started learning the Java programming language must understand the basic data types needed. Check out this article to test how much you know!

Java’s four categories and eight basic data types

The first category: whole Type byte, short, int, long

The second type: floating point type float, double

The third type: logical type boolean (it only has two values ​​that can be true/false)

Category 4: Character type char

Java reference data type

Arrays, classes and interfaces

Bytes Bybts (one byte is equal to 8 bits)
boolean Boolean type                     1/8
byte byte type                   1
char character type                                                                                               ’ ’ ’ ’ ’ ’ 1/8      
byte byte type             behind through ’ ’ ’ ’ out out out out out out off out's out's' ’ ’ ’ ’ ’’s through out through through ‐ through ‐‐‐‐‐‐‐‐‐‐ long                          2
int integer type                 4
float Floating point type (single precision)                                                                                                                                                                                                           To define it as a float type, you need to add l or L after the value;
The default floating point type is also a double-precision floating point. If you want to define it as a float type, you need to add f or F after the value.

Automatic conversion of basic data typesbyte->short,char -> int -> long

float -> double

int -> float

long -> double

TIP: Small lengths can be converted to larger ones , however, the original accuracy will be lost when changing from large to small! ! !

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