JAVASE8 Basic Parent-child classes have static blocks of code and construct blocks of code, a simple example of the order of execution

Os:windows7 x64
Jdk:jdk-8u131-windows-x64
Ide:eclipse Oxygen Release (4.7.0)


Code:

Parent class class Father {//Static code block statics {System.out.println ("Static code block for parent class");} Constructs a code block {System.out.println ("Construction code block for the parent class");} Public Father () {System.out.println ("constructor for parent class");}} Class Son extends Father {//Static code block statics {System.out.println ("Static code block of Subclass");} Construct code block {System.out.println ("construct code block for subclass");} Public Son () {///default will call the parent class's parameterless constructor System.out.println ("constructor of the subclass");}} Class Demo {public static void main (string[] args) {//So many pieces, who executes first? Son S1 = new Son ();/**  class loader lead class loading work, static code blocks run when the class is loaded. *  class loader found son as a subclass, there is a parent class, so the parent class is loaded first, so the static code block of the parent class runs first. *  after the parent class is loaded, the child class is not loaded back. So, the static code block of the subclass will run later. *  for reference only ... */}}

Results:

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JAVASE8 Basic Parent-child classes have static blocks of code and construct blocks of code, a simple example of the order of execution