The use of Java object initialization sequence

Author：Eve Cole Update Time：2024-11-18 18:42:01

Single class: (static member variables & static initialization block) < (member variables & initialization block) < constructor

Copy the code code as follows:

public class object initialization sequence {
public static void main(String[] args){
Person p = new Person();
}
}
class Person{
public static String staticfield = "static member variable";
public String field="member variable";
static
{
System.out.println(staticfield);
System.out.println("static initialization block");
}
{
System.out.println(field);
System.out.println("Initialization block");
}
Person(){
System.out.println("constructor");
}

}

Output results

Static member variables static initialization block member variable initialization block constructor inheritance class: (parent class static member variables & parent class static initialization block) < (child class static member variables & child class static initialization block) < (parent class variables & parent class Initialization block) < (parent class constructor & subclass variables) < (subclass initialization block & subclass constructor)

The words in parentheses are determined according to the order of appearance.