5-2 jmu-java-m05-自定义Judgeable接口 (10分)

5-2 jmu-java-m05-自定义Judgeable接口 (10分)
该程序包含

Person类：

属性：String name,boolean gender String birthdate。

构造方法：无参构造方法（初始化名字为空字符串，gender为false）

(name,gender)

(name,gender,birthdate)

方法：getter/setter方法。

自定义接口Judgeable

方法：boolean judge(String)

静态方法：int countPerson(List,Judgeable):实现判断List集合中符合Judge方法的集合元素，并返回其个数

main方法:

定义一个Person类集合，输入个数n，在下面依次输入n行的name,gender，biryhDate值生成person对象并添加进集合。

判断集合中name长度为5的数的个数，并输出，具体格式见输出样例。

判断集合中name长度为7的数的个数，并输出，具体格式见输出样例。

判断集合中name为空的个数，并输出，具体格式见输出样例。

输入格式:
输入一个整数number

根据number，输入number行的name,gender,birthDate

参考代码:

import java.util.ArrayList;
import java.util.List;
import java.util.Scanner;

class Person{

//在这里按要求定义person类

}

//在这里给出Judgeable接口的定义，入参为String，返回boolean。

public class Main {

public static int countPerson(List personList, Judgeable judger) {
	int n = 0;
	for (Person person : personList) {
		if (judger.judge(person.getName()))
			n++;
    }
    return n;
}


public static void main(String[] args) {
	Scanner sc = new Scanner(System.in);
	List personList = new ArrayList();
	String name;
	boolean gender;
	String  birthDate;

	//在这里输入个数

	//循环创建person对象存入personList最后

		//注意：当name输入为null时，将其置为空

	int nameLength5 = countPerson(personList, new Judgeable() {
		//Judgeable的实现代码

	});

	System.out.println("Number of person with nameLength == 5:"+nameLength5);
	int nameLength7 = countPerson(personList, new Judgeable() {
		//Judgeable的实现代码
	});

	System.out.println("Number of person with nameLength == 7:"+nameLength7);
	int nameisnull = countPerson(personList, new Judgeable() {
		//Judgeable的实现代码
	});

	System.out.println("Number of person with null name:"+nameisnull);
}

}

输出格式：
name长度为5的名字的个数

name长度为7的名字的个数

name为null的个数

输入样例：
9
Aaron false 1999-12-19
Abigale true 1998-09-01
null false 1992-11-21
Bonnie true 1990-11-11
null false 1994-07-08
Carol false 1982-12-04
Celeste true 1987-03-01
null false 1996-04-01
Chloe true 1993-02-16

输出样例：
Number of person with nameLength == 5:3
Number of person with nameLength == 7:2
Number of person with null name:3

注意:样例输出不包含检验代码输出，提交时请务必添加检验代码。

作者
郑如滨
单位
集美大学
代码长度限制
16 KB
时间限制
400 ms
内存限制
64 MB

import java.util.ArrayList;
import java.util.List;
import java.util.Scanner;
class Person{

	//在这里按要求定义person类
	private String name;
	private boolean gender;
	private String birthDate;
	
	public Person()
	{
		
	}
	public Person(String name,boolean gender)
	{
		this.name=name;
		this.gender=gender;
	}
	public Person(String name,boolean gender,String birthDate)
	{
		if(name=="null")
		{
			this.name=null;
		}
		else
		{
			this.name = name;
		}
		
		this.gender=gender;
		this.birthDate=birthDate;
		
	}
	public String getName() {
		return name;
	}
	public void setName(String name) {
		this.name = name;
	}
	public boolean getGender() {
		return gender;
	}
	public void setGender(boolean gender) {
		this.gender = gender;
	}
	public String getBirthDate() {
		return birthDate;
	}
	public void setBirthdate(String DirthDate) {
		this.birthDate = DirthDate;
	}
	public String toString()
	{
		return "Person:"+getName()+" "+getGender()+" "+getBirthDate();
	}
}



	//在这里给出Judgeable接口的定义，入参为String，返回boolean。
interface Judgeable
{
	boolean judge(String str);

	public static int countPerson(List<Person> personList, Judgeable judger) 
	{
		return 0;
	}

}


public class Main{

    public static int countPerson(List<Person> personList, Judgeable judger) {
		int n = 0;
		for (Person person : personList) {
			if (judger.judge(person.getName()))
				n++;
        }
        return n;
    }


    public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		List<Person> personList = new ArrayList<Person>();
		String name;
		boolean gender;
		String  birthDate;

		//在这里输入个数
		int n = sc.nextInt();
		//循环创建person对象存入personList最后
		for(int i=0;i<n;i++)
		{
			//注意：当name输入为null时，将其置为空
			name = sc.next();
			gender = sc.next()=="true"?true:false;
			birthDate=sc.next();
			
			Person p = new Person(name,gender,birthDate);
			
			
//			if(name=="null")
//			{
//				p.setName(null);
//			}////////
			personList.add(p);

		}
		//System.out.println(personList);//test

		
		
		int nameLength5 = countPerson(personList, new Judgeable() {
			//Judgeable的实现代码
			public boolean judge(String name)
			{
				if(name.length()==5)
					{
					return true;
					}
				else
					{
					return false;
					}
			}
			

		});

		System.out.println("Number of person with nameLength == 5:"+nameLength5);
		int nameLength7 = countPerson(personList, new Judgeable() {//(匿名内部类？)
			//Judgeable的实现代码
			public boolean judge(String name)
			{
				if(name.length()==7)
					{
					return true;
					}
				else
					{
					return false;
					}
			}
	
		});

		System.out.println("Number of person with nameLength == 7:"+nameLength7);
		int nameisnull = countPerson(personList, new Judgeable() {
			//Judgeable的实现代码
			public boolean judge(String name)
			{
				//if(name==null)
				//if(name.isEmpty())
				if(name.equals("null")){
					return true;
					}
				else
					{
					return false;
					}
			}
			
		});

		System.out.println("Number of person with null name:"+nameisnull);
    }
}