[Deep into Java Virtual Machine] 3: class initialization

Class Father {public static int m = 33; static {System. out. println ("parent class initialized");} class Child extends Father {static {System. out. println ("subclass initialized");} public class StaticTest {public static void main (String [] args) {System. out. println (Child. m );}}

33

Class Const {public static final String NAME = "I am a constant"; static {System. out. println ("initialize Const class") ;}} public class FinalTest {public static void main (String [] args) {System. out. println (Const. NAME );}}

Class Const {static {System. out. println ("initialize Const class") ;}} public class ArrayTest {public static void main (String [] args) {Const [] con = new Const [5] ;}}

Class Const {static {System. out. println ("initialize Const class") ;}} public class ArrayTest {public static void main (String [] args) {Const [] con = new Const [5]; for (Const a: con) a = new Const ();}}

The following output result is displayed:

According to the first of the four rules, the new triggers the Const class.