What is the difference between Byte and byte in Java?

byte and Byte

byte is the basic data type of java, which stores integer data and occupies 1 byte (8 bits). The range of data that can be stored is -128~127.

Byte is a class in java.lang, whose purpose is to encapsulate the basic data type byte.

The relationship between the two:

Byte is the packaging class of byte, just like the relationship between Integer and int.

Generally, the packaging class is used for general purpose Type or provide static methods for conversion between basic types or strings. It is recommended not to use operations between wrapper classes and basic types, because the operation efficiency will be very poor

Benefits of encapsulation

Encapsulation has several benefits, such as:

1. Byte can pass the reference of the object, allowing multiple functions to jointly operate a byte type of data, and the byte basic data type It is stored in the stack (stack area) after assignment;

2. Wrapping classes in java is mostly used in the conversion of various data types.

For example, now byte needs to be converted to String

byte a=0;
String result=Integer.toString(a);

3. When using generics

List<Integer> nums;

hereneeds a class. If you use int. It will report an error

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