普通类、抽象类、接口之间的继承实现关系

普通类、抽象类、接口之间的继承实现关系图（参考：类与抽象类接口的关系）：

下面从执行的结果中，清晰呈现了代码的执行顺序。序号 5~9 说的问题，哪位能明白是咋会儿事的，请在评论区指导一下，谢谢！

 1 package test;
 2 
 3 public class ExtentsAndImplements {
 4 
 5     /**
 6      * 这块代码打开注释，FatherRootClass()、FatherRootAbstract()、ChildrenClass()
 7      * 上面这一串构造函数会在 System.out.println(" call Main() ................") 与 主类构造函数 ExtentsAndImplements() 之间执行【比较不好理解】。
 8      **/
 9 //     ChildrenClass childrenClass = new ChildrenClass();
10 
11     ExtentsAndImplements (){
12         System.out.println(" 主类无参构造函数执行：ExtentsAndImplements construct 11111111111111111111");
13     }
14 
15     public static void main(String[] args) {
16         System.out.println(" call Main() ................");
17         ChildrenClass childrenClass = new ExtentsAndImplements().new ChildrenClass(" new ChildrenClass(param) : ");
18         System.out.println(" ChildrenClass test() ................");
19         childrenClass.test();
20     }
21 
22     class FatherRootClass {
23         private FatherRootClass(){
24             System.out.println(" FatherRootClass No construct !!!=================");
25         }
26         private FatherRootClass(String FatherRootClass){
27             System.out.println(FatherRootClass + " FatherRootClass construct !!!=================");
28         }
29     }
30 
31     interface SimpleRootInterface {
32         void run();
33     }
34 
35     abstract class FatherRootAbstract extends FatherRootClass implements SimpleRootInterface{
36         public FatherRootAbstract(){
37             System.out.println(" FatherRootAbstract extends FatherRootClass No construct !!!  #######################");
38         }
39         public FatherRootAbstract(String FatherRootAbstract){
40             super(FatherRootAbstract);
41             System.out.println(FatherRootAbstract + " FatherRootAbstract extends FatherRootClass construct !!!  #######################");
42         }
43 
44         abstract void excute();
45 
46         @Override
47         public void run() {
48             this.excute();
49             System.out.println(" FatherRootAbstract implements SimpleRootInterface.run(). " +
50                     "this is FatherRootAbstract'run(). ------333333333333333333333");
51         }
52 
53     }
54 
55     class ChildrenClass extends FatherRootAbstract{
56         public ChildrenClass(){
57             System.out.println(" ChildrenClass extends FatherRootAbstract No construct !!!  @@@@@@@@@@@@@@@@@@@@");
58         }
59         public ChildrenClass(String begin){
60             super(begin);
61             System.out.println(begin + " ChildrenClass extends FatherRootAbstract construct !!!  @@@@@@@@@@@@@@@@@@@@");
62         }
63 
64         private void test(){
65 //            super.run();
66             this.run();
67             this.excute();
68             System.out.println(" SUCCESS!");
69         }
70 
71         @Override
72         public void excute() {
73             System.out.println(" ChildrenClass extends FatherRootAbstract implements SimpleRootInterface. " +
74                     "this is ChildrenClass'excute(). ------666666666666666666666");
75         }
76     }
77 
78 }

运行结果：

 1  call Main() ................
 2  主类无参构造函数执行：ExtentsAndImplements construct 11111111111111111111
 3  new ChildrenClass(param) :  FatherRootClass construct !!!=================
 4  new ChildrenClass(param) :  FatherRootAbstract extends FatherRootClass construct !!!  #######################
 5  new ChildrenClass(param) :  ChildrenClass extends FatherRootAbstract construct !!!  @@@@@@@@@@@@@@@@@@@@
 6  ChildrenClass test() ................
 7  ChildrenClass extends FatherRootAbstract implements SimpleRootInterface. this is ChildrenClass'excute(). ------666666666666666666666
 8  FatherRootAbstract implements SimpleRootInterface.run(). this is FatherRootAbstract'run(). ------333333333333333333333
 9  ChildrenClass extends FatherRootAbstract implements SimpleRootInterface. this is ChildrenClass'excute(). ------666666666666666666666
10  SUCCESS!

其余代码不变，把序号9 （ChildrenClass childrenClass = new ChildrenClass();）的注释打开，再执行程序，运行结果为（结果中的2、3、4 在1、5之间执行，我有点懵，有能看明白的高手，请在评论区点化点化(*￣︶￣) ）：

 1  call Main() ................
 2  FatherRootClass No construct !!!=================
 3  FatherRootAbstract extends FatherRootClass No construct !!!  #######################
 4  ChildrenClass extends FatherRootAbstract No construct !!!  @@@@@@@@@@@@@@@@@@@@
 5  主类无参构造函数执行：ExtentsAndImplements construct 11111111111111111111
 6  new ChildrenClass(param) :  FatherRootClass construct !!!=================
 7  new ChildrenClass(param) :  FatherRootAbstract extends FatherRootClass construct !!!  #######################
 8  new ChildrenClass(param) :  ChildrenClass extends FatherRootAbstract construct !!!  @@@@@@@@@@@@@@@@@@@@
 9  ChildrenClass test() ................
10  ChildrenClass extends FatherRootAbstract implements SimpleRootInterface. this is ChildrenClass'excute(). ------666666666666666666666
11  FatherRootAbstract implements SimpleRootInterface.run(). this is FatherRootAbstract'run(). ------333333333333333333333
12  ChildrenClass extends FatherRootAbstract implements SimpleRootInterface. this is ChildrenClass'excute(). ------666666666666666666666
13  SUCCESS!