package com.ch.exer1;/* * 编写一个Employee类，声明为抽象类，包含如下三个属性：name，id，salary。提供必要的构造器和抽象方法：work()。 *  *  */public abstract class Employee {        private String name;    private int id;    private double salary;    public Employee() {        super();    }    public Employee(String name, int id, double salary) {        super();        this.name = name;        this.id = id;        this.salary = salary;    }        public abstract void work();}

package com.ch.exer1;/* * 对于Manager类来说，他既是员工，还具有奖金(bonus)的属性。 */public class Manager extends Employee{        private double bonus;//奖金            public Manager(double bonus) {        super();        this.bonus = bonus;    }    public Manager(String name, int id, double salary, double bonus) {        super(name, id, salary);        this.bonus = bonus;    }    @Override    public void work() {        System.out.println("管理员工，提供公司运行的效率");    }            }

package com.ch.exer1;public class CommonEmployee extends Employee {    @Override    public void work() {        System.out.println("员工在一线车间生产产品");    }}

package com.ch.exer1;/* * 请使用继承的思想，设计CommonEmployee类和Manager类，要求类中提供必要的方法进行属性访问。 */public class EmployeeTest {    public static void main(String[] args) {                //多态        Employee manager = new Manager("库克", 1001, 5000, 50000);                manager.work();                CommonEmployee commonEmployee = new CommonEmployee();        commonEmployee.work();            }}