1 package com.helei.init; 2 3 class Log { 4 public static String fatherStaticString(){System.out.println("father's static field");return "";} 5 public static String sonStaticString(){System.out.println("son's static field");return "";} 6 public static String fatherNormalString(){System.out.println("father's normal field");return "";} 7 public static String sonNormalString(){System.out.println("son's normal field");return "";} 8 } 9 class Father{ 10 String fatherNormalField1 = Log.fatherNormalString(); 11 static String fatherStaticField1 = Log.fatherStaticString(); 12 13 {System.out.println("Father's normal block1");} 14 15 static {System.out.println("Father's static block1");} 16 static {System.out.println("Father's static block2");} 17 18 static String fatherStaticField2 = Log.fatherStaticString(); 19 20 {System.out.println("Father's normal block2");} 21 22 String fatherNormalField2 = Log.fatherNormalString(); 23 24 Father(){ 25 System.out.println("Father's constructor"); 26 } 27 } 28 public class Son extends Father { 29 String sonNormalField1 = Log.sonNormalString(); 30 static String sonStaticField1 = Log.sonStaticString(); 31 32 {System.out.println("Son's normal block1");} 33 34 static {System.out.println("Son's static block1");} 35 static {System.out.println("Son's static block2");} 36 37 static String sonStaticField2 = Log.sonStaticString(); 38 39 {System.out.println("Son's normal block2");} 40 41 String sonNormalField2 = Log.sonNormalString(); 42 43 Son(){ 44 System.out.println("Son's constructor"); 45 } 46 47 public static void main(String[] args){ 48 Son son1 = new Son(); 49 Son son2 = new Son(); 50 } 51 }
1 father's static field 2 Father's static block1 3 Father's static block2 4 father's static field 5 son's static field 6 Son's static block1 7 Son's static block2 8 son's static field 9 father's normal field 10 Father's normal block1 11 Father's normal block2 12 father's normal field 13 Father's constructor 14 son's normal field 15 Son's normal block1 16 Son's normal block2 17 son's normal field 18 Son's constructor 19 father's normal field 20 Father's normal block1 21 Father's normal block2 22 father's normal field 23 Father's constructor 24 son's normal field 25 Son's normal block1 26 Son's normal block2 27 son's normal field 28 Son's constructor
1、父类静态字段/代码块（并列优先级，按代码顺序）
2、子类静态字段/代码块（并列优先级，按代码顺序）
3、父类普通字段/代码块（并列优先级，按代码顺序）
4、父类构造方法
5、子类普通字段/代码块（并列优先级，按代码顺序）
6、子类构造方法
Java初始化顺序：
1、先父类后子类
2、先静态字段或代码块，后普通字段或代码块（并列优先级，按代码顺序）
3、先父类构造方法，后子类构造方法