package com.unit2.test; public class Test4 { public static void main(String[] args) { Salary s=new Salary("员工A","北京",3,3600.00); Employee e=new Salary("员工B","上海",2,2400.00); System.out.println("使用Salary的引用调用mailcheck--"); s.mailCheck(); System.out.println("\n使用employee的引用调用mailcheck--"); e.mailCheck(); } public class Employee{ private String name; private String address; private int number; public Employee(String name,String address,int number) { System.out.println("Employee 构造函数"); this.name=name; this.address=address; this.number=number; } public void mailCheck() { System.out.println("邮寄支票给："+this.name+" "+this.address); } public String toString() { return name+" "+address+" "+number; } public String getName() { return name; } public String getAddress(String newAddress) { return address; } public void setAddress(String newAddress) { address=newAddress; } public int getNumber() { return number; } } public static class Salary extends Employee { private double salary;//全年工资 public Salary(String name,String address,int number,double salary) { super(name,address,number); setSalary(salary); } public void mailCheck() { System.out.println("Salary类的mailcheck方法"); System.out.println("邮寄支票给："+getName()+",工资为"+salary); } public double getSalary() { return salary; } public void setSalary(double newSalary) { if(newSalary>=0.0) { salary=newSalary; } } public double computePay() { System.out.println("计算工资，付给："+getName()); return salary/52; } } }更正以上代码错误

以下是更正后的代码：

package com.unit2.test;

public class Test4 {
    public static void main(String[] args) {
        Salary s = new Salary("员工A", "北京", 3, 3600.00);
        Employee e = new Salary("员工B", "上海", 2, 2400.00);
        System.out.println("使用Salary的引用调用mailcheck--");
        s.mailCheck();
        System.out.println("\n使用employee的引用调用mailcheck--");
        e.mailCheck();
    }

    public static class Employee {
        private String name;
        private String address;
        private int number;

        public Employee(String name, String address, int number) {
            System.out.println("Employee 构造函数");
            this.name = name;
            this.address = address;
            this.number = number;
        }

        public void mailCheck() {
            System.out.println("邮寄支票给：" + this.name + " " + this.address);
        }

        public String toString() {
            return name + " " + address + " " + number;
        }

        public String getName() {
            return name;
        }

        public String getAddress() {
            return address;
        }

        public void setAddress(String newAddress) {
            address = newAddress;
        }

        public int getNumber() {
            return number;
        }
    }

    public static class Salary extends Employee {
        private double salary;// 全年工资

        public Salary(String name, String address, int number, double salary) {
            super(name, address, number);
            setSalary(salary);
        }

        public void mailCheck() {
            System.out.println("Salary类的mailcheck方法");
            System.out.println("邮寄支票给：" + getName() + ",工资为" + salary);
        }

        public double getSalary() {
            return salary;
        }

        public void setSalary(double newSalary) {
            if (newSalary >= 0.0) {
                salary = newSalary;
            }
        }

        public double computePay() {
            System.out.println("计算工资，付给：" + getName());
            return salary / 52;
        }
    }
}

更正说明：

1. 将 `Employee` 类和 `Salary` 类都声明为静态内部类，以便在 `main` 方法中使用。

2. `Employee` 类中的 `getAddress` 方法声明错误，应该是 `public String getAddress()`。

3. 在 `Salary` 类中重写了 `mailCheck` 方法，输出的信息更具体，同时也调用了 `getName` 方法来获取员工名字。

4. 在 `Salary` 类中新增了 `computePay` 方法，用于计算每周的工资。