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
时间: 2023-06-07 12:12:05 浏览: 131
以下是Math类常用方法-java语言中使用的类总结
好的,你的第一个问题是关于Java类的设计。根据你提供的要求,我可以给出如下的代码实现:
```java
import java.time.LocalDate;
abstract class Person {
private int id;
private String name;
private 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 + "-" + getName();
}
}
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 + "-" + getName();
}
}
public class Main {
public static void main(String[] args) {
// 产生n个对象
Student s1 = new Student(1, "Liz", 1986, 10, 10, 2000, "Net01");
Student s2 = new Student(2, "Sally", 2000, 1, 3, 2018, "Software02");
Teacher t1 = new Teacher(3, "Tom", 1978, 5, 7, "CS", 2500.5);
Teacher t2 = new Teacher(4, "Jerry", 1988, 6, 7, "Mechanical", 1990);
Teacher t3 = new Teacher(5, "Eliza", 2001, 2, 5, "Software", 2019);
Teacher t4 = new Teacher(6, "Li", 1978, 5, 7, "cs", 2400);
// 输出结果
int studentCount = 0;
int teacherCount = 0;
Person[] people = new Person[]{s1, s2, t1, t2, t3, t4};
for (Person p : people) {
if (p instanceof Student) {
studentCount++;
System.out.println(p.getPersonInfo());
} else if (p instanceof Teacher) {
teacherCount++;
System.out.println(p.getPersonInfo());
}
}
System.out.println("Student " + studentCount + "人");
System.out.println("Teacher " + teacherCount + "人");
}
}
```
这个程序定义了一个抽象类 `Person`,其中包含了所有人的基本属性(id、name、birthDate),并定义了一个抽象方法 `getPersonInfo()` 来获取人的相关信息。子类 `Student` 和 `Teacher` 继承了 `Person` 类,并分别覆盖了 `getPersonInfo()` 方法,以实现自己特有的信息格式。在 `Main` 类中,通过输入参数(姓名、出生年月日、入学年份、班级或系、薪水)创建了多个 `Student` 和 `Teacher` 对象,并输出了它们的信息。同时,还统计了学生人数和教师人数。
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