关于Map的作业

1、使用List，map容器存放如下数据，并从map中取出“李四”
姓名：张三 年龄：18 体重：90 地址：北京
姓名：李四 年龄：28 体重：50 地址：上海

package MapHomeWork;

public class Person {
    private String name;
    private int age;
    private int weight;
    private String address;

    public Person() {

    }

    public Person(String name, int age, int weight, String address) {
        this.name = name;
        this.age = age;
        this.weight = weight;
        this.address = address;
    }


    @Override
    public String toString() {
        return "Person{" +
                "name='" + name + '\'' +
                ", age=" + age +
                ", weight=" + weight +
                ", address='" + address + '\'' +
                '}';
    }
}

package MapHomeWork;

import java.util.HashMap;
import java.util.Map;

public class MapDemo {

    public static void main(String[] args) {

        Map<String,Person> map1 = new HashMap<String,Person>();
        map1.put("张三",new Person("张三",18,80,"北京"));
        map1.put("李四",new Person("李四",20,60,"上海"));
        System.out.println(map1.get("张三"));
    }
}

package MapHomeWork;

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

public class ListDemo {

    public static void main(String[] args) {
        List<Person> list = new ArrayList<Person>();
        list.add(new Person("张三",18,80,"北京"));
        list.add(new Person("李四",20,60,"上海"));

    }
}

 

1、假如有以下email数据
“[email protected],[email protected],[email protected]”，现需要把email中的用户部分和邮件地址部分分离，分离后以键值对应的方式放入HashMap？

package MapHomeWork;

import java.util.HashMap;
import java.util.Set;

public class EmailSplit {

    public static void main(String[] args) {

        String addresses = "[email protected],[email protected],[email protected]";
        String[] address = addresses.split(",");

        HashMap<String,String> hashMap = new HashMap<String, String>();

        for(String str : address){

            String[] flag = str.split("@");
            hashMap.put(flag[0],flag[1]);

        }

        Set<String> keys = hashMap.keySet();
        for(String key:keys){
            System.out.println(key+"的地址是"+hashMap.get(key));
        }
    }

}