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！ 

package test;

public class ExtentsAndImplements {

    /**
     * 这块代码打开注释，FatherRootClass()、FatherRootAbstract()、ChildrenClass()
     * 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】。
     **/
//     ChildrenClass childrenClass = new ChildrenClass();

    ExtentsAndImplements (){
        System.out.println(" 主类无参构造函数执行：ExtentsAndImplements construct 11111111111111111111");
    }

    public static void main(String[] args) {
        System.out.println(" call Main() ................");
        ChildrenClass childrenClass = new ExtentsAndImplements().new ChildrenClass(" new ChildrenClass(param) : ");
        System.out.println(" ChildrenClass test() ................");
        childrenClass.test();
    }

    class FatherRootClass {
        private FatherRootClass(){
            System.out.println(" FatherRootClass No construct !!!=================");
        }
        private FatherRootClass(String FatherRootClass){
            System.out.println(FatherRootClass + " FatherRootClass construct !!!=================");
        }
    }

    interface SimpleRootInterface {
        void run();
    }

    abstract class FatherRootAbstract extends FatherRootClass implements SimpleRootInterface{
        public FatherRootAbstract(){
            System.out.println(" FatherRootAbstract extends FatherRootClass No construct !!!  #######################");
        }
        public FatherRootAbstract(String FatherRootAbstract){
            super(FatherRootAbstract);
            System.out.println(FatherRootAbstract + " FatherRootAbstract extends FatherRootClass construct !!!  #######################");
        }

        abstract void excute();

        @Override
        public void run() {
            this.excute();
            System.out.println(" FatherRootAbstract implements SimpleRootInterface.run(). " +
                    "this is FatherRootAbstract'run(). ------333333333333333333333");
        }

    }

    class ChildrenClass extends FatherRootAbstract{
        public ChildrenClass(){
            System.out.println(" ChildrenClass extends FatherRootAbstract No construct !!!  @@@@@@@@@@@@@@@@@@@@");
        }
        public ChildrenClass(String begin){
            super(begin);
            System.out.println(begin + " ChildrenClass extends FatherRootAbstract construct !!!  @@@@@@@@@@@@@@@@@@@@");
        }

        private void test(){
//            super.run();
            this.run();
            this.excute();
            System.out.println(" SUCCESS!");
        }

        @Override
        public void excute() {
            System.out.println(" ChildrenClass extends FatherRootAbstract implements SimpleRootInterface. " +
                    "this is ChildrenClass'excute(). ------666666666666666666666");
        }
    }

}

运行结果：

 call Main() ................
 主类无参构造函数执行：ExtentsAndImplements construct 11111111111111111111
 new ChildrenClass(param) :  FatherRootClass construct !!!=================
 new ChildrenClass(param) :  FatherRootAbstract extends FatherRootClass construct !!!  #######################
 new ChildrenClass(param) :  ChildrenClass extends FatherRootAbstract construct !!!  @@@@@@@@@@@@@@@@@@@@
 ChildrenClass test() ................
 ChildrenClass extends FatherRootAbstract implements SimpleRootInterface. this is ChildrenClass'excute(). ------666666666666666666666
 FatherRootAbstract implements SimpleRootInterface.run(). this is FatherRootAbstract'run(). ------333333333333333333333
 ChildrenClass extends FatherRootAbstract implements SimpleRootInterface. this is ChildrenClass'excute(). ------666666666666666666666
 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(*￣︶￣) ）：

 call Main() ................
 FatherRootClass No construct !!!=================
 FatherRootAbstract extends FatherRootClass No construct !!!  #######################
 ChildrenClass extends FatherRootAbstract No construct !!!  @@@@@@@@@@@@@@@@@@@@
 主类无参构造函数执行：ExtentsAndImplements construct 11111111111111111111
 new ChildrenClass(param) :  FatherRootClass construct !!!=================
 new ChildrenClass(param) :  FatherRootAbstract extends FatherRootClass construct !!!  #######################
 new ChildrenClass(param) :  ChildrenClass extends FatherRootAbstract construct !!!  @@@@@@@@@@@@@@@@@@@@
 ChildrenClass test() ................
 ChildrenClass extends FatherRootAbstract implements SimpleRootInterface. this is ChildrenClass'excute(). ------666666666666666666666
 FatherRootAbstract implements SimpleRootInterface.run(). this is FatherRootAbstract'run(). ------333333333333333333333
 ChildrenClass extends FatherRootAbstract implements SimpleRootInterface. this is ChildrenClass'excute(). ------666666666666666666666
 SUCCESS!