如何将HashMap添加到Employee类列表中

import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

public class Main {
    public static void main(String[] args) {
        List<Employee> employeeList = new ArrayList<>();

        // 创建HashMap对象
        Map<Integer, Employee> employeeMap = new HashMap<>();

        // 创建Employee对象并设置属性
        Employee employee1 = new Employee(1, "John", "Developer");
        Employee employee2 = new Employee(2, "Jane", "Designer");

        // 将Employee对象添加到HashMap中
        employeeMap.put(employee1.getId(), employee1);
        employeeMap.put(employee2.getId(), employee2);

        // 将HashMap对象添加到Employee类列表中
        employeeList.addAll(employeeMap.values());

        // 打印Employee类列表中的所有员工信息
        for (Employee employee : employeeList) {
            System.out.println("ID: " + employee.getId() + ", Name: " + employee.getName() + ", Role: " + employee.getRole());
        }
    }
}

class Employee {
    private int id;
    private String name;
    private String role;

    public Employee(int id, String name, String role) {
        this.id = id;
        this.name = name;
        this.role = role;
    }

    public int getId() {
        return id;
    }

    public String getName() {
        return name;
    }

    public String getRole() {
        return role;
    }
}