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;
    }

    @Override
    public 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

    @Override
    public 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;
    }

    @Override
    public 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;
    }

    @Override
    public String toString() {
        return name;
    }         //直接返回name

    public 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;
    }

    @Override
    public 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);
                }
            }
        }

    }
}