请求解释一下注释部分的代码，详细点

Question

问题遇到的现象和发生背景

问题相关代码，请勿粘贴截图

class Member{
        private int mid; 
        private String name;
        private Car car；  //这里请求解释
        public Member(int mid,String name){
            this.mid =mid ;
            this.name=name;
        }
        public void setCar (Car car){     //这里这个方法请求解释
            this.car=car;
        }
        public Car getCar(){      //这里这个方法请求解释
            return this.car;
        }
        
        public String getInfo(){
            return "人员编号:"+this.mid+",姓名："+this.name;
        }
    }
    class Car {
        private Member member; //这里请求解释
        private String pname;
        public Car (String pname){
            this.pname=pname;
        }
        public void setMember (Member member){  //这里这个方法请求解释
            this.member=member;
        }
        public Member getMember(){   //这里这个方法请求解释
            return this.member;
        }
        public String getInfo(){
            return "车的名字:"+this.pname;
        }
    }
    
    public class Demo{
        public static void main(String args[]){
            Member m =new Member(1,"冬眠");
            Car c = new Car("一手奥迪");
            m.setCar(c);
            c.setMember(m);
            System.out.println(m.getCar().getInfo());
            System.out.println(c.getMember().getInfo());
        }
    }

运行结果及报错内容

我的解答思路和尝试过的方法

我想要达到的结果

Answer 1

//会员类定义
class Member{
        private int mid; 
        private String name;
        private Car car；  //定义一个用于在会员类中调用的汽车类对象，通过下方的汽车类声明
        public Member(int mid,String name){
            this.mid =mid ;
            this.name=name;
        }
        public void setCar (Car car){     //用于将汽车数据赋值给该会员的汽车对象
            this.car=car;
        }
        public Car getCar(){      //用于获取本会员的汽车对象数据
            return this.car;
        }
        
        public String getInfo(){
            return "人员编号:"+this.mid+",姓名："+this.name;
        }
    }

//汽车类定义
    class Car {
        private Member member; //声明会员对象（通过上面定义的会员类声明）
        private String pname;
        public Car (String pname){
            this.pname=pname;
        }
        public void setMember (Member member){  //用于给会员对象赋值数据
            this.member=member;
        }
        public Member getMember(){   //用于获取会员对象的数据
            return this.member;
        }
        public String getInfo(){
            return "车的名字:"+this.pname;
        }
    }
    
    public class Demo{
        public static void main(String args[]){
            Member m =new Member(1,"冬眠"); //定义一个会员对象，数据：ID为1，名称为冬眠
            Car c = new Car("一手奥迪"); //定义一个车辆对象，数据：名称一手奥迪
            m.setCar(c); //将一手奥迪赋值给冬眠
            c.setMember(m);//将冬眠赋值给一手奥迪
            System.out.println(m.getCar().getInfo());//获取会员的汽车信息
            System.out.println(c.getMember().getInfo());//获取汽车的会员信息
        }
    }