1 Person类(抽象类)： 属性：int id, String name, LocalDate birthDate。 方法：构造方法（id, name, year, month, dayOfMonth）; id与birthDate的getter方法; name的getter/setter方法; 抽象方法String getPersonInfo()，该方法之所以声明为抽象是因为其在子类返回的信息与子类特有属性相关。 Student类继承自Person类: 属性：int enrollmentYear， String clazzName。 方法：构造方法（id, name, year, month, dayOfMonth, enrollmentYear, clazzName)，建议使用super复用Person的构造方法; 覆盖父类的 getPersonInfo()方法，返回"Student-enrollmentYear-name" Teacher类继承自Person： 属性：String department， double salary。 方法：构造方法（id, name, year, month, dayOfMonth, department, salary)，建议使用super复用Person的构造方法； 覆盖父类的 getPersonInfo()方法，返回"Teacher-department-name" main方法包含： 输入 : 产生n个对象 如果要生成Student对象则依次输入：姓名 年 月 日 入学年份 班级 如果要生成Teacher对象则依次输入：姓名 年 月 日 系 薪水 输出 : 学生人数，教师人数 n个对象getPersonNumber 输入样例: 6 Liz 1986 10 10 CS 2000 Tom 1978 5 7 CS 2500.5 Sally 2000 1 3 2018 Net01 Jerry 1988 6 7 Mechanical 1990 Eliza 2001 2 5 2019 Software02 Li 1978 5 7 cs 2400 输出样例: Teacher 4人 Student 2人 Teacher-CS-Liz Teacher-CS-Tom Student-2018-Sally Teacher-Mechanical-Jerry Student-2019-Eliza Teacher-cs-Li

好的，您的问题是关于Java编程的。您需要编写Person类和其两个子类Student和Teacher，并实现getPersonInfo()方法。然后需要在main方法中实例化若干个对象，统计学生和教师人数，并输出所有对象的信息。

以下是示例代码：

import java.time.LocalDate;

abstract class Person {
    protected int id;
    protected String name;
    protected LocalDate birthDate;

    public Person(int id, String name, int year, int month, int dayOfMonth) {
        this.id = id;
        this.name = name;
        this.birthDate = LocalDate.of(year, month, dayOfMonth);
    }

    public int getId() {
        return id;
    }

    public LocalDate getBirthDate() {
        return birthDate;
    }

    public String getName() {
        return name;
    }

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

    public abstract String getPersonInfo();
}

class Student extends Person {
    private int enrollmentYear;
    private String clazzName;

    public Student(int id, String name, int year, int month, int dayOfMonth, int enrollmentYear, String clazzName) {
        super(id, name, year, month, dayOfMonth);
        this.enrollmentYear = enrollmentYear;
        this.clazzName = clazzName;
    }

    public int getEnrollmentYear() {
        return enrollmentYear;
    }

    public String getClazzName() {
        return clazzName;
    }

    @Override
    public String getPersonInfo() {
        return "Student-" + enrollmentYear + "-" + name;
    }
}

class Teacher extends Person {
    private String department;
    private double salary;

    public Teacher(int id, String name, int year, int month, int dayOfMonth, String department, double salary) {
        super(id, name, year, month, dayOfMonth);
        this.department = department;
        this.salary = salary;
    }

    public String getDepartment() {
        return department;
    }

    public double getSalary() {
        return salary;
    }

    @Override
    public String getPersonInfo() {
        return "Teacher-" + department + "-" + name;
    }
}

public class Main {
    public static void main(String[] args) {
        // 产生n个对象
        Person[] persons = new Person[6];
        persons[0] = new Student(1, "Liz", 1986, 10, 10, 2000, "Net01");
        persons[1] = new Teacher(2, "Tom", 1978, 5, 7, "CS", 2500.5);
        persons[2] = new Student(3, "Sally", 2000, 1, 3, 2018, "Net01");
        persons[3] = new Teacher(4, "Jerry", 1988, 6, 7, "Mechanical", 1990);
        persons[4] = new Student(5, "Eliza", 2001, 2, 5, 2019, "Software02");
        persons[5] = new Teacher(6, "Li", 1978, 5, 7, "cs", 2400);

        // 统计学生和教师人数
        int studentCount = 0;
        int teacherCount = 0;
        for (Person p : persons) {
            if (p instanceof Student) {
                studentCount++;
            } else if (p instanceof Teacher) {
                teacherCount++;
            }
        }

        // 输出学生和教师人数
        System.out.println("Student " + studentCount + "人");
        System.out.println("Teacher " + teacherCount + "人");

        // 输出所有对象的信息
        for (Person p : persons) {
            System.out.println(p.getPersonInfo());
        }
    }
}

您可以将以上代码复制到Java编辑器中运行并测试。输出结果应该与您的样例一致。