java-关于静态代码块和构造方法的执行顺序的探讨

下面以一个小demo为例进行探讨

 

 

 

 

 

 运行结果:

class A static
class B static
I'm A class
class A
I'm B class
class B

由此可见：执行顺序是：静态初始化块 -> 初始化块 -> 构造方法

 

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package com.algorithm;   public class Animal {     private int count;       public int getCount() {         return count;     } }

　　

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package com.algorithm;   public class Panada {     public static void main(String[] args) {         Animal animal = new Animal();         System.out.println("========"+animal.getCount());     } }

　　

运行结果：0

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package com.algorithm;   public class Animal {     private static int count;       public static int getCount() {         return count;     } }

　　

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package com.algorithm;   public class Panada {     public static void main(String[] args) {         System.out.println("========"+Animal.getCount());     } }

　　

运行结果：0

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package com.algorithm;   public class Animal {     private static int count;       static {         count=2;     }       public static int getCount() {         return count;     } }

　　

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package com.algorithm;   public class Panada {     public static void main(String[] args) {         System.out.println("========"+Animal.getCount());     } }

　　

运行结果：2