抽象类的例子

Employee

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();
}

Manager

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");
    }
    
    
    
}

CommonEmployee

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");
    }

}

EmployeeTest

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();
        
    }
}