关联和依赖的应用理解

 

public class TextP {

 

public static void main(String[] args) {

 

Person p1 = new Person("小红",18);//声明，并附初始值

 

System.out.println(p1.age+"岁的"+p1.name+"用"+p1.phone1.price+"买"+p1.phone1.color+p1.phone1.type);

 

Phone phone1=new Phone();//声明

p1.play(phone1);//依赖，调用Phone中的play方法

 

}

 

}

 

 

public class Person {

//属性

String name;

int age;

Phone phone1=new Phone("白色","OPPO",3999);//关联，作为属性存在

 

Person(){

 

}

 

Person(String name,int age){

this.name=name;

this.age=age;

 

 

}

 

void play(Phone phone) {

phone.call();

phone.internet();

}

 

 

}

 

 

 

public class Phone {

String color;

String type;

int price;

 

 

Phone(){

 

}

 

Phone(String color,String type,int price){

this.color=color;

this.type=type;

this.price=price;

}

 

void call() {

System.out.println("在打电话");

}

 

void internet(){

System.out.println("在上网");

}

 

}