7-6 jmu-Java-03面向对象-06-继承覆盖综合练习

写之前还是要先明确好程序编写的要求，以免过了样例但代码运行逻辑和要求不符合。

记录一个比较浮点型数据的方法

String df1 = new DecimalFormat("#.#").format(this.salary);
String df2 = new DecimalFormat("#.#").format(e.salary);
return this.company.toString().compareTo(e.company.toString()) == 0 && df1.compareTo(df2)==0;

import java.text.DecimalFormat;
import java.util.*;abstract class Person implements Comparable<Person> {String name;int age;boolean gender;Person() {}Person(String name, int age, boolean gender) {this.name = name;this.age = age;this.gender = gender;}@Overridepublic String toString() {return this.name + "-" + this.age + "-" + this.gender;}         //返回"name-age-gender"格式的字符串public boolean equals(Person o1) {if (this.name.equals(o1.name) && this.gender == o1.gender && this.age == o1.age) {return true;} else {return false;}}//比较name、age、gender,都相同返回true,否则返回false@Overridepublic int compareTo(Person o) {if (this.name.compareTo(o.name) > 0) {return 1;} else if (this.name.compareTo(o.name) < 0) {return -1;} else {return this.age - o.age;}}
}class Student extends Person {String stuNo;String clazz;Student() {super();}Student(String name, int age, boolean gender, String stuNo, String clazz) {super(name, age, gender);this.stuNo = stuNo;this.clazz = clazz;}@Overridepublic String toString() {return this.name + "-" + this.age + "-" + this.gender + "-" + this.stuNo + "-" + this.clazz;}public boolean equals(Student o2) {if (super.equals(o2) && this.stuNo.equals(o2.stuNo) && this.clazz.equals(o2.clazz)) {return true;} else {return false;}}
}class Company {String name;Company(String name) {this.name = name;}@Overridepublic String toString() {return name;}         //直接返回namepublic boolean equals(Person o1) {if (o1.name == this.name) {return true;} else {return false;}}}class Employee extends Person {Company company;double salary;//建议使用super复用Person类的相关有参构造函数Employee(String name, int age, boolean gender, double salary, Company company) {super(name, age, gender);this.company = company;this.salary = salary;}@Overridepublic String toString() {return this.name + "-" + this.age + "-" + this.gender + "-" + this.company + "-" + this.salary;}public boolean equals(Employee e) {if (super.equals(e) && this.company.name.equals(e.company.name)) {String df1 = new DecimalFormat("#.#").format(this.salary);String df2 = new DecimalFormat("#.#").format(e.salary);return this.company.toString().compareTo(e.company.toString()) == 0 && df1.compareTo(df2) == 0;} else {return false;}}}class Main {public static void main(String[] args) {List<Person> personList = new ArrayList<>();List<Student> stuList = new ArrayList<>();List<Employee> empList = new ArrayList<>();Scanner sc = new Scanner(System.in);String op;while (true) {op = sc.next();//System.out.println(op);if (op.equals("s")) {String name;int age;boolean gender;String stuNo;String clazz;name = sc.next();age = sc.nextInt();gender = sc.nextBoolean();stuNo = sc.next();clazz = sc.next();if (name.equals("null") || stuNo.equals("null")) {continue;} else {Student st = new Student(name, age, gender, stuNo, clazz);personList.add(st);}} else if (op.equals("e")) {String name;int age;boolean gender;String company;double salary;name = sc.next();age = sc.nextInt();gender = sc.nextBoolean();salary = sc.nextDouble();company = sc.next();if (name.equals("null")) {continue;} else {Company cm = new Company(company);Employee em = new Employee(name, age, gender, salary, cm);personList.add(em);}} else {Collections.sort(personList);for (Person person : personList) {if (person instanceof Student) {Student student = (Student) person;int f = 1;for (Student stu : stuList) {if (stu.equals(student)) {f = 0;break;}}if (f == 1) {stuList.add(student);}System.out.println("Student:" + student);} else if (person instanceof Employee) {Employee employee = (Employee) person;int f = 1;for (Employee emp : empList) {if (emp.equals(employee)) {f = 0;break;}}if (f == 1) {empList.add(employee);}System.out.println("Employee:" + employee);}}op = sc.next();if (op.equals("exit")) {break;} else if (op.equals("return")) {break;}System.out.println("stuList");for (Student student : stuList) {System.out.println("Student:" + student);}System.out.println("empList");for (Employee employee : empList) {System.out.println("Employee:" + employee);}}}}
}

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