假设一个公司的员工分为志愿者Volunter和普通员工Employee，请先设计一个StuffMember的抽象类作为不同类型员工的父类，包含员工都具有的name,address以及phone属性（建议是public 或者是protected类型）。且：(1)需要建议以下格式的构造函数,并补充构造函数内的语句Public StuffMember(String ename, String eaddress,String iphone)(2)需要构造一个抽象方法：public abstract double pay();(3) 需要建立一个toString方法返回StuffMember的信息,请补充toString方法的方法体Public String toString(){}完成Volunter类，该类继承了StuffMember的抽象类并需要重载父类的pay()方法.(1) Volunter类中的pay方法返回一个浮点的0值就可以了。(2) 请显示定义Volunter类的带参数的构造函数。完成有薪资的Employee类，该类继承了StuffMember的抽象类，并含有自己的属性社会保险号String 类型的sccialSecurityNumber,和酬金率double 类型的payRate。(1)请建立5个参数的构造函数。(2) 请需要建立一个toString方法返回Employee的信息,请补充toString方法的方法体。(3) 建立Employee类的pay() 方法，该方法只返回员工的payRate*2500。建立Excutive类继承了Employee类，并包含一个double类型的奖金属性bonus。(1) 建立Excutive类的包含6个参数的构造函数(2) 重构pay()方法，需要实现工资计算Payment=super.pay() +bonus; Bonus=0;完成按小时付钱的员工类Hourly类，该类继承了Employee类，并包含一个double类型的奖金属性double hourWorked。(1) 建立Hourly类的包含6个参数的构造函数(2) 重构pay()方法，需要实现工资计算Payment=super.payRate * hourWorked; hourWorked=0；(3) 建立toStr

ing方法返回Hourly类的信息，请补充toString方法的方法体。

以下是代码实现：

public abstract class StuffMember {
    protected String name;
    protected String address;
    protected String phone;
    
    public StuffMember(String ename, String eaddress, String iphone) {
        name = ename;
        address = eaddress;
        phone = iphone;
    }
    
    public abstract double pay();
    
    public String toString() {
        return "Name: " + name + "\nAddress: " + address + "\nPhone: " + phone;
    }
}

public class Volunter extends StuffMember {
    public Volunter(String ename, String eaddress, String iphone) {
        super(ename, eaddress, iphone);
    }
    
    public double pay() {
        return 0.0;
    }
}

public class Employee extends StuffMember {
    private String socialSecurityNumber;
    private double payRate;
    
    public Employee(String ename, String eaddress, String iphone, String ssn, double rate) {
        super(ename, eaddress, iphone);
        socialSecurityNumber = ssn;
        payRate = rate;
    }
    
    public String toString() {
        return super.toString() + "\nSocial Security Number: " + socialSecurityNumber;
    }
    
    public double pay() {
        return payRate * 2500.0;
    }
}

public class Excutive extends Employee {
    private double bonus;
    
    public Excutive(String ename, String eaddress, String iphone, String ssn, double rate, double b) {
        super(ename, eaddress, iphone, ssn, rate);
        bonus = b;
    }
    
    public double pay() {
        double payment = super.pay() + bonus;
        bonus = 0.0;
        return payment;
    }
}

public class Hourly extends Employee {
    private double hourWorked;
    
    public Hourly(String ename, String eaddress, String iphone, String ssn, double rate, double hours) {
        super(ename, eaddress, iphone, ssn, rate);
        hourWorked = hours;
    }
    
    public String toString() {
        return super.toString() + "\nHours Worked: " + hourWorked;
    }
    
    public double pay() {
        double payment = super.payRate * hourWorked;
        hourWorked = 0.0;
        return payment;
    }
}