Java Field Initialization rule:

Java Field Initialization rule:

There are two initialization blocks and constructors in Java, where initialization blocks are divided into static initialization blocks and instance initialization blocks (the above program is an instance initialization block). Static initialization blocks are initialization blocks in a class that are decorated with static, and instance initialization blocks are initialization statements that do not have any keyword adornments in the class.

Executes the default value specified by the class member definition or the initialization block of the class, exactly which one you want to see in front of.

Reference by number of arguments when there are two constructors

Java Field Initialization rule: