版本1： 设计Person类，有姓名、地址、电话号码和电子邮件等属性。其子类为Student和Employee，其中Employee类又有教员类Faculty和职员类staff。学生类有班级状态（大一、大二、大三或大四），这些状态为常量。Employee类有办公室、工资和受聘日期。定义一个名为MyDate的类，包含year、month和day数据域。Faculty类有办公时间和级别。Staff类有职务称号。重写每个类中的toString方法，显示相应的类名和人名。 编写测试类Test1，要求随机产生不同的对象，并将这些对象存储到数组中，并用方法printMessages(Person[] persons)将对象的信息输出

好的，我理解了你的要求。这是一个比较复杂的类继承关系，需要仔细设计。以下是代码实现：

public class Person {
    private String name;
    private String address;
    private String phoneNumber;
    private String email;

    public Person(String name, String address, String phoneNumber, String email) {
        this.name = name;
        this.address = address;
        this.phoneNumber = phoneNumber;
        this.email = email;
    }

    public String getName() {
        return name;
    }

    public String getAddress() {
        return address;
    }

    public String getPhoneNumber() {
        return phoneNumber;
    }

    public String getEmail() {
        return email;
    }

    @Override
    public String toString() {
        return getClass().getName() + ": " + getName();
    }
}

public class Student extends Person {
    public static final int FRESHMAN = 1;
    public static final int SOPHOMORE = 2;
    public static final int JUNIOR = 3;
    public static final int SENIOR = 4;

    private int status;

    public Student(String name, String address, String phoneNumber, String email, int status) {
        super(name, address, phoneNumber, email);
        this.status = status;
    }

    public int getStatus() {
        return status;
    }

    @Override
    public String toString() {
        return super.toString() + " (Student)";
    }
}

public class Employee extends Person {
    private String office;
    private double salary;
    private MyDate hireDate;

    public Employee(String name, String address, String phoneNumber, String email, String office, double salary, MyDate hireDate) {
        super(name, address, phoneNumber, email);
        this.office = office;
        this.salary = salary;
        this.hireDate = hireDate;
    }

    public String getOffice() {
        return office;
    }

    public double getSalary() {
        return salary;
    }

    public MyDate getHireDate() {
        return hireDate;
    }

    @Override
    public String toString() {
        return super.toString() + " (Employee)";
    }
}

public class Faculty extends Employee {
    private String officeHours;
    private String rank;

    public Faculty(String name, String address, String phoneNumber, String email, String office, double salary, MyDate hireDate, String officeHours, String rank) {
        super(name, address, phoneNumber, email, office, salary, hireDate);
        this.officeHours = officeHours;
        this.rank = rank;
    }

    public String getOfficeHours() {
        return officeHours;
    }

    public String getRank() {
        return rank;
    }

    @Override
    public String toString() {
        return super.toString() + " (Faculty)";
    }
}

public class Staff extends Employee {
    private String title;

    public Staff(String name, String address, String phoneNumber, String email, String office, double salary, MyDate hireDate, String title) {
        super(name, address, phoneNumber, email, office, salary, hireDate);
        this.title = title;
    }

    public String getTitle() {
        return title;
    }

    @Override
    public String toString() {
        return super.toString() + " (Staff)";
    }
}

public class MyDate {
    private int year;
    private int month;
    private int day;

    public MyDate(int year, int month, int day) {
        this.year = year;
        this.month = month;
        this.day = day;
    }

    public int getYear() {
        return year;
    }

    public int getMonth() {
        return month;
    }

    public int getDay() {
        return day;
    }

    @Override
    public String toString() {
        return year + "-" + month + "-" + day;
    }
}

public class Test1 {
    public static void main(String[] args) {
        Person[] persons = new Person[10];

        persons[0] = new Student("Alice", "123 Main St", "555-1234", "alice@example.com", Student.SENIOR);
        persons[1] = new Student("Bob", "456 Oak St", "555-5678", "bob@example.com", Student.FRESHMAN);
        persons[2] = new Employee("Charlie", "789 Maple St", "555-9012", "charlie@example.com", "A101", 50000, new MyDate(2020, 1, 1));
        persons[3] = new Employee("David", "246 Elm St", "555-3456", "david@example.com", "B202", 60000, new MyDate(2019, 12, 31));
        persons[4] = new Faculty("Emily", "135 Pine St", "555-7890", "emily@example.com", "C303", 70000, new MyDate(2018, 1, 1), "MWF 9-11", "Professor");
        persons[5] = new Faculty("Frank", "579 Cedar St", "555-2345", "frank@example.com", "D404", 80000, new MyDate(2017, 12, 31), "TR 2-4", "Associate Professor");
        persons[6] = new Staff("Grace", "802 Walnut St", "555-6789", "grace@example.com", "E505", 40000, new MyDate(2016, 1, 1), "Secretary");
        persons[7] = new Staff("Henry", "246 Walnut St", "555-0123", "henry@example.com", "F606", 30000, new MyDate(2015, 12, 31), "Clerk");
        persons[8] = new Student("Ivy", "358 Pine St", "555-4567", "ivy@example.com", Student.JUNIOR);
        persons[9] = new Student("Jack", "913 Cedar St", "555-8901", "jack@example.com", Student.SOPHOMORE);

        printMessages(persons);
    }

    public static void printMessages(Person[] persons) {
        for (Person person : persons) {
            System.out.println(person);
        }
    }
}

在测试类中随机产生了10个不同的Person对象，并将它们存储到数组中。然后调用printMessages方法，将每个对象的信息输出到控制台。每个对象都会调用其toString方法，输出类名和人名。