Java/com/study/demo13/MemberService.java

package com.study.demo13;

abstract class Member {
    protected int points;

    public Member(int points) {
        this.points = points;
    }

    abstract int calculateFinalPoints();

    String getLevel() {
        int finalPoints = calculateFinalPoints();
        if (finalPoints >= 1000) {
            return "VIP";
        } else if (finalPoints >= 500) {
            return "GOLD";
        } else {
            return "NORMAL";
        }
    }
}

class NormalMember extends Member {
    public NormalMember(int points) {
        super(points);
    }

    @Override
    int calculateFinalPoints() {
        return points;
    }
}

class VIPMember extends Member {
    public VIPMember(int points) {
        super(points);
    }

    @Override
    int calculateFinalPoints() {
        return points * 2;
    }
}

public class MemberService {
    public static void main(String[] args) {
        Member normal1 = new NormalMember(300);
        Member normal2 = new NormalMember(600);
        Member normal3 = new NormalMember(1200);
        Member vip1 = new VIPMember(300);
        Member vip2 = new VIPMember(400);
        Member vip3 = new VIPMember(600);

        System.out.println("NormalMember - 最终积分: " + normal1.calculateFinalPoints() + ", 等级: " + normal1.getLevel());
        System.out.println("NormalMember - 最终积分: " + normal2.calculateFinalPoints() + ", 等级: " + normal2.getLevel());
        System.out.println("NormalMember - 最终积分: " + normal3.calculateFinalPoints() + ", 等级: " + normal3.getLevel());
        System.out.println("VIPMember - 最终积分: " + vip1.calculateFinalPoints() + ", 等级: " + vip1.getLevel());
        System.out.println("VIPMember - 最终积分: " + vip2.calculateFinalPoints() + ", 等级: " + vip2.getLevel());
        System.out.println("VIPMember - 最终积分: " + vip3.calculateFinalPoints() + ", 等级: " + vip3.getLevel());
    }
}