Java面向对象类关联结构（）关系-蒲公英云

Java面向对象类关联结构（）关系

一对一 person car
一对多 person children （自身关联）

先写基本关系后加

package com.msc.example;
class Car{ 
    private String cname ;
    private double price ;
    private Person person;
    public Car() { } ;
    public Car(String cname,double price){ 
        this.cname = cname ;
        this.price = price ;
    }
    public void setPerson(Person person){ 
          this.person = person ;
    }
    public Person getPerson(){ 
        return this.person ;
    }
    public void setCname(String cname){ 
        this.cname = cname ;
    }
    public void setPrice(double price){ 
        this.price = price ;
    }
    public String getCname(){ 
        return this.cname ;
    }
    public double getPrice(){ 
        return this.price ;
    }
    public String getInfo(){ 
        return "【汽车信息】名字 = "+this.cname+" 价格 = "+ this.price ;
    }
}
class Person{ 
    private String pname ;
    private int age ;
    private Car car ;
    private Person children[] ;
    public Person() { };
    public Person(String pname,int age) { 
        this.pname = pname ;
        this.age = age ;
    };
    public void setChildren(Person[] children) { 
        this.children = children;
    }
    public Person[] getChildren() { 
        return this.children;
    }
    public void setCar(Car car) { 
        this.car = car;
    }
    public Car getCar() { 
        return this.car;
    }
    public void setPname(String pname) { 
        this.pname = pname;
    }
    public void setAge(int age) { 
        this.age = age;
    }
    public int getAge() { 
        return this.age;
    }
    public String getPname() { 
        return this.pname;
    }
    public String getInfo(){ 
        return "【个人信息】 姓名 = "+this.pname+" 年龄 = "+this.age ;
    }
}
public class JavaBegin { 
    public static void main(String args[]){ 
       // 第一步声明对象并设置彼此的关系
       Person father = new Person("张三",45) ;
       Person mother = new Person("王五",46) ;
       Person son = new Person("小刘",45) ;
       Person daugher = new Person("小莉",45) ;
       Car carA = new Car("法拉利",100000) ;
       Car carB = new Car("兰博基尼",600000) ;
       Car carC = new Car("奥迪",15640) ;
       Car carD = new Car("奔驰",200) ;
       father.setCar(carA);
       carA.setPerson(father);
       mother.setCar(carB);
       carB.setPerson(mother);
       son.setCar(carC);
       carA.setPerson(son);
       daugher.setCar(carD);
       carD.setPerson(daugher);
       father.setChildren(new Person[]{ son,daugher}) ;
       mother.setChildren(new Person[]{ son,daugher}) ;
       // 第二步根据关系获取数据
       System.out.println(father.getInfo()+" and "+father.getCar().getInfo()); //人找车
       System.out.println(carB.getInfo()+" and "+carB.getPerson().getInfo());  //车找人
       for(Person temp : father.getChildren()){ 
            System.out.println(temp.getInfo());
        }
       for(int x = 0 ;x<mother.getChildren().length;x++){ 
            System.out.println(mother.getChildren()[x].getInfo());
        }
    }
}