java入门作业：Employee类声明为抽象类 包含三个属性：name、id、salary 提供必要的构造器和抽象方法：work（）对于Manager类来说，他既是员工，还具有（bonus）的属性

1、员工类：

public abstract class Employee {
    //名字
    private String name;
    //编号
    private int id;
    //薪水
    private double salary;
    //无参构造
    public Employee(){

    }
    //有参构造
    public Employee(String name,int id, double salary){
        this.name = name;
        this.id = id;
        this.salary = salary;
    }

    public void setName(String name) {
        this.name = name;
    }

    public String getName() {
        return name;
    }

    public double getSalary() {
        return salary;
    }

    public void setSalary(double salary) {
        this.salary = salary;
    }

    public int getId() {
        return id;
    }

    public void setId(int id) {
        this.id = id;
    }

    @Override
    public String toString() {
        return getName()+"{"+",id:" + getId()+",salary:"+getSalary()+'}';
    }
    //抽象类方法：work()
    public abstract void work();
}

2、经理类：

public class Manager extends Employee {
    //经理的奖金
    private double bonus;
    //无参构造
    public Manager(){

    }
    //有参构造1
    public Manager(double bonus){
        //可通过super直接赋值   这样更简便
        super("li",123,2000.0);
        this.bonus = bonus;
    }
    //有参构造   自己赋值
    public Manager(String name,int id,double salary,double bonus){
        super(name,id,salary);
        this.bonus = bonus;
    }

    public double getBonus() {
        return bonus;
    }

    public void setBonus(double bonus) {
        this.bonus = bonus;
    }

    //抽象方法的实现
    public void work(){
        System.out.println(getName()+"经理工作中");
    }

    @Override
    public String toString() {
        return getName()+"{" + "bonus:" + bonus +",id:" + getId()+",salary:"+getSalary()+'}';
    }
}

3、测试类：

public class EmployeeTest {
    public static void main(String[] args) {
        //创建员工对象  而且是一个经理
        Employee e1 = new Manager(1000.0);
        //重写过Manager类的toString方法   可直接输出e1的所有信息
        System.out.println(e1);
        //调用Manager类的work（）方法
        e1.work();
    }
}

4、输出结果：

li{bonus:1000.0,id:123,salary:2000.0}
li经理工作中

Process finished with exit code 0