读温昱《软件架构设计》

一道笔试题的故事

package architect;

/*
 * to constrcut Parent.
to construct Delegatee.
to construct Child.
构造一个类时，它的父类和成员变量所属类的构造函数都会被自动执行，
具体顺序时先Parent 再 Delegatee 最后child
page 305  软件架构设计 温昱
 */
public class ParantChildDelegatee {

 public ParantChildDelegatee() {
  // TODO Auto-generated constructor stub
 }

 public static void main(String[] args) {
  // TODO Auto-generated method stub
  Child child = new Child();
 }
}

class Parent {
 Parent() {
  System.out.println("to constrcut Parent.");
 }
}

class Child extends Parent {
 Child() {
  System.out.println("to construct Child.");
 }
 
 Delegatee delegatee = new Delegatee();
}

class Delegatee {
 Delegatee() {
  System.out.println("to construct Delegatee.");
 }
}