jmu-Java-03面向对象-06-继承覆盖综合练习-Person、Student、Employee、Company (15分)

定义Person抽象类，Student类、Company类，Employee类。
Person类的属性：String name, int age, boolean gender
Person类的方法:

public Person(String name, int age, boolean gender);
public String toString();         //返回"name-age-gender"格式的字符串
public boolean equals(Object obj);//比较name、age、gender,都相同返回true,否则返回false

Student类继承自Person，属性:String stuNo, String clazz
Student类的方法:

//建议使用super复用Person类的相关有参构造函数
public Student(String name, int age, boolean gender, String stuNo, String clazz);
public String toString();         //返回 “Student:person的toString-stuNo-clazz”格式的字符串
public boolean equals(Object obj);//首先调用父类的equals方法,如果返回true，则继续比较stuNo与clazz。

Company类属性：String name
Company类方法:

public Company(String name);
public String toString();         //直接返回name
public boolean equals(Object obj);//name相同返回true

Employee类继承自Person，属性：Company company, double salary
Employee类方法：

//建议使用super复用Person类的相关有参构造函数
public Employee(String name, int age, boolean gender, double salary, Company company);
public String toString();         //返回"Employee:person的toString-company-salary"格式的字符串
public boolean equals(Object obj);//首先调用父类的equals方法,如果返回true。再比较company与salary。
//比较salary属性时，使用DecimalFormat df = new DecimalFormat("#.#");保留1位小数

编写equals方法重要说明：

对Employee的company属性的比较。要考虑传入为null的情况。如果company不为null且传入为null，返回false
对所有String字符类型比较时，也要考虑null情况。

提示

排序可使用Collections.sort
equals方法要考虑周全

main方法说明

创建若干Student对象、Employee对象。
输入s，然后依次输入name age gender stuNo clazz创建Student对象。
输入e，然后依次输入name age gender salary company创建Employee对象。
然后将创建好的对象放入List personList。输入其他字符，则结束创建。
创建说明:对于String类型，如果为null则不创建对象，而赋值为null。对于company属性，如果为null则赋值为null，否则创建相应的Company对象。

对personList中的元素实现先按照姓名升序排序，姓名相同再按照年龄升序排序。提示：可使用Comparable或Comparator

接受输入，如果输入为exit则return退出程序，否则继续下面步骤。

将personList中的元素按照类型分别放到stuList与empList。注意：不要将两个内容相同的对象放入列表（是否相同是根据equals返回结果进行判定）。

输出字符串stuList，然后输出stuList中的每个对象。

输出字符串empList，然后输出empList中的每个对象。

1-3为一个测试点 4-6为一个测试点
输入样例：

s zhang 23 false 001 net15
e wang 18 true 3000.51 IBM
s zhang 23 false 001 net15
e bo 25 true 5000.51 IBM
e bo 25 true 5000.52 IBM
e bo 18 true 5000.54 IBM
e tan 25 true 5000.56 IBM
e tan 25 true 5000.51 IBM
s wang 17 false 002 null
s wang 17 false 002 null
e hua 16 false 1000 null
s wang 17 false 002 net16
e hua 16 false 1000 null
e hua 18 false 1234 MicroSoft
!
continue

为方便测试用例，以下代码用于自动创建对象：

       //测试数据创建
       String[] perInfo= {//测试数据
    		   "s zhang 23 false 001 net15" , 
    		   "e wang 18 true 3000.51 IBM" , 
    		   "s zhang 23 false 001 net15" , 
    		   "e bo 25 true 5000.51 IBM" , 
    		   "e bo 25 true 5000.52 IBM" , 
    		   "e bo 18 true 5000.54 IBM" , 
    		   "e tan 25 true 5000.56 IBM" , 
    		   "e tan 25 true 5000.51 IBM" , 
    		   "s wang 17 false 002 null" , 
    		   "s wang 17 false 002 null" , 
    		   "e hua 16 false 1000 null" , 
    		   "s wang 17 false 002 net16" , 
    		   "e hua 16 false 1000 null" , 
    		   "e hua 18 false 1234 MicroSoft"
       };
       for(int i=0;i<perInfo.length;i++) {//数据创建
    	   String info[] = perInfo[i].split(" ");
    	   if(info[0].equals("s")) {
    		   
    		   Student s = new Student(info[1], 
    				   Integer.parseInt(info[2]), 
    				   Boolean.parseBoolean(info[3]), 
    				   info[4], 
    				   info[5]);
    		   personList.add(s);   
    	   }
    	   if(info[0].equals("e")) {
    		   Employee e = new Employee(info[1], 
    				   Integer.parseInt(info[2]), 
    				   Boolean.parseBoolean(info[3]), 
    				   Double.parseDouble(info[4]), 
    				   new Company(info[5])); 
    		   personList.add(e);
    	   }
       }
       

输出样例：

Employee:bo-18-true-IBM-5000.54 Employee:bo-25-true-IBM-5000.51
Employee:bo-25-true-IBM-5000.52 Employee:hua-16-false-null-1000.0
Employee:hua-16-false-null-1000.0
Employee:hua-18-false-MicroSoft-1234.0
Employee:tan-25-true-IBM-5000.56 Employee:tan-25-true-IBM-5000.51
Student:wang-17-false-002-null Student:wang-17-false-002-null
Student:wang-17-false-002-net16 Employee:wang-18-true-IBM-3000.51
Student:zhang-23-false-001-net15 Student:zhang-23-false-001-net15
stuList Student:wang-17-false-002-null Student:wang-17-false-002-net16
Student:zhang-23-false-001-net15 empList
Employee:bo-18-true-IBM-5000.54 Employee:bo-25-true-IBM-5000.51
Employee:hua-16-false-null-1000.0
Employee:hua-18-false-MicroSoft-1234.0
Employee:tan-25-true-IBM-5000.56 Employee:tan-25-true-IBM-5000.51
Employee:wang-18-true-IBM-3000.51

import java.util.ArrayList;
import java.util.Collections;
import java.util.Comparator;
import java.util.List;
import java.util.Scanner;
import java.text.DecimalFormat;

abstract class Person {// 抽象类
    public String name;
    public int age;
    public boolean gender;
    public Person(String name,int age,boolean gender) {
    	this.name = name;
    	this.age = age;
    	this.gender = gender;
    }
    public String toString() {
    	return this.name+"-"+this.age+"-"+this.gender;
    }
    public boolean equals(Person obj) {
    	if(obj==null) return false;
    	return obj.name.equals(this.name)&&
    			obj.age==this.age&&
    			obj.gender==this.gender;
    }
}
class Company{
	public String name;
	public Company(String name) {
		this.name = name;
	}
	public String toString() {
		return this.name;
	}
	public boolean equals(Company obj) {
		if(obj==null) return false;
		return obj.name.equals(this.name);
	}
}
class Employee extends Person{
	public Company company;
	private double salary;
	public Employee(String name, int age, boolean gender,double salary,Company company) {
		super(name, age, gender);
		this.salary = salary;
		this.company = new Company(company.name);
	}
	public String toString() {
		return "Employee:"+super.toString()+"-"+this.company.toString()+"-"+this.salary;
	}
	public boolean equals(Employee obj) {
		DecimalFormat df = new DecimalFormat("#.#");//保留一位小数
		if(super.equals(obj)) {
			return df.format(obj.salary).equals(df.format(this.salary))&&
					this.company.equals(obj.company);
		}else return false;
	}
}
class Student extends Person{
	private String stuNo;
	private String clazz;
	public Student(String name, int age, boolean gender,String stuNo,String clazz) {
		super(name, age, gender);
		this.clazz = clazz;
		this.stuNo = stuNo;
	}
	public String toString() {
		return "Student:"+super.toString()+"-"+this.stuNo+"-"+this.clazz;
	}
	public boolean equals(Student obj) {
		if(super.equals(obj)) {
			return this.stuNo.equals(obj.stuNo)&&
					this.clazz.equals(obj.clazz);
		}else return false;
	}
}

public class Main {
    public static void main(String[] args) {
       List<Person> personList = new ArrayList<Person>() ;
       List<Student> stuList = new ArrayList<Student>();
       List<Employee> empList = new ArrayList<Employee>() ;
       Scanner sc = new Scanner(System.in);
       //输入数据 
       while(true) {
    	   String perInfo = sc.nextLine();
    	   String info[] = perInfo.split(" ");
    	   
    	   if(info[0].equals("s")) {
    		   
    		   Student s = new Student(info[1], 
    				   Integer.parseInt(info[2]), 
    				   Boolean.parseBoolean(info[3]), 
    				   info[4], 
    				   info[5]);
    		   personList.add(s);   
    	   }
    	   else if(info[0].equals("e")) {
    		   Employee e = new Employee(info[1], 
    				   Integer.parseInt(info[2]), 
    				   Boolean.parseBoolean(info[3]), 
    				   Double.parseDouble(info[4]), 
    				   new Company(info[5])); 
    		   personList.add(e);
    	   } else break;
    	   Collections.sort(personList,new Comparator<Person>() 
   		@Override
   		public int compare(Person o1, Person o2) {
   			if(o1.equals(null)&&o2.equals(null)) return 0;
   			if(o1.name.compareTo(o2.name)==0)
   				return o1.age-o2.age;
   			else return o1.name.compareTo(o2.name);			
   		}   	   
   	});
       }
        for(Person p :personList)
    	    System.out.println(p.toString());
       if(sc.next().equals("exit"))  {
    	   sc.close();
    	   return ;
       }  
       //对象分类
       for(Person p:personList) {
    	   boolean flag = true;
    	   if(p instanceof Student){
    		   //比较相同对象
    		   for(Student s:stuList) {
    			   if(s.equals((Student)p)) {
    				   flag = false;
    				   break;
    			   }
    		   }
    		   if(flag) stuList.add((Student)p);
    	   }else if(p instanceof Employee) {
    		   for(Employee e:empList) {
    			   if(e.equals((Employee)p)) {
    				   flag = false;
    				   break;
    			   }	   
    		   }
    		   if(flag) empList.add((Employee)p);;  
    	   }
       }
       //输出对象
       System.out.println("stuList");
       for(Student s:stuList)
    	   System.out.println(s.toString());
       System.out.println("empList");
       for(Employee e:empList)
    	   System.out.println(e.toString());
       sc.close();
    } 
}