Java 成员初始化顺序

package com.cwcec.test;

class Fu
{
    int num = 5;
    //构造代码块
    {
        System.out.println("Fu constructor code..." + num);
        num=6;
    }
    public Fu() {
        System.out.println("Fu constructor ..." + num);
        show();
    }

     void show() {
        System.out.println("show ..." + num);
    }
    
}

class Zi extends Fu
{
    int num = 9;
    //构造代码块
    {
        System.out.println("Zi constructor code..." + num);
        num = 10;
    }
    public Zi() 
    {
        System.out.println("Zi constructor ..." + num);
    }
    void show()
    {
        System.out.println("show ..." + num);
    }
}

public class FieldDemo 
{
    public static void main(String[] args)
    {  
        new Zi();
    }  
  
} 

class Animal
{
    public String name = "Ti";
    public static int age = 10;
    static
    {
        System.out.println("Animal age : " + age);
        
    }
    public Animal()
    {
        age = 100;
        System.out.println("Animal constructor...");
    }
    
    public void display()
    {
        System.out.println("name: " + name);
    }
    
}

class Dog extends Animal
{

    public static int size = 20;
    static
    {
        
        System.out.println("Dog size : " + size);
    }
    
    public Dog()
    {
        size = 200;
        System.out.println("Dog constructor...");
    }

    public static void sleep() {
        System.out.println("Dog sleep...");
    }
    
}

public class Single
{

    public static void main(String[] args) {

        Dog dog = new Dog();
    }
}