update:demo13

com/study/demo13/AttendanceService.java

@@ -0,0 +1,57 @@
+package com.study.demo13;
+
+abstract class Employee {
+    private String name;
+    protected int workDays;
+
+    public Employee(String name, int workDays) {
+        this.name = name;
+        this.workDays = workDays;
+    }
+
+    abstract int calculateAttendance();
+
+    boolean isExcellent() {
+        return calculateAttendance() >= 40;
+    }
+
+    public String getName() {
+        return name;
+    }
+}
+
+class FullTimeEmployee extends Employee {
+    public FullTimeEmployee(String name, int workDays) {
+        super(name, workDays);
+    }
+
+    @Override
+    int calculateAttendance() {
+        return workDays * 2;
+    }
+}
+
+class InternEmployee extends Employee {
+    public InternEmployee(String name, int workDays) {
+        super(name, workDays);
+    }
+
+    @Override
+    int calculateAttendance() {
+        return workDays + 5;
+    }
+}
+
+public class AttendanceService {
+    public static void main(String[] args) {
+        Employee fullTime = new FullTimeEmployee("张三", 22);
+        Employee intern = new InternEmployee("李四", 20);
+        Employee fullTimeLow = new FullTimeEmployee("王五", 18);
+        Employee internExcellent = new InternEmployee("赵六", 30);
+
+        System.out.println(fullTime.getName() + " - 出勤分: " + fullTime.calculateAttendance() + " - 是否优秀: " + fullTime.isExcellent());
+        System.out.println(intern.getName() + " - 出勤分: " + intern.calculateAttendance() + " - 是否优秀: " + intern.isExcellent());
+        System.out.println(fullTimeLow.getName() + " - 出勤分: " + fullTimeLow.calculateAttendance() + " - 是否优秀: " + fullTimeLow.isExcellent());
+        System.out.println(internExcellent.getName() + " - 出勤分: " + internExcellent.calculateAttendance() + " - 是否优秀: " + internExcellent.isExcellent());
+    }
+}