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.");
}
}
