update:demo13

com/study/demo13/MemberService.java

@@ -0,0 +1,62 @@
+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());
+    }
+}