Map练习：输出工资大于10的员工（两种方式）

package October;

import java.util.*;

public class Test {
    public static void main(String[] args) {
        Map map = new HashMap();
        map.put(1,new Employee(101,"morty",1000));
        map.put(2,new Employee(102,"rick",1000));
        map.put(3,new Employee(103,"jerry",10));
        //获取所有的key值
        Set set = map.keySet();
        //1 使用增强for
        for (Object key :set) {
            //map.get(key)获取所有的value并存入em
            Employee em = (Employee) map.get(key);
            if(em.getSalary()>10){
                System.out.println(map.get(key));
            }
        }
        //2 使用EntrySet和迭代器
        Set e_set = map.entrySet();
        Iterator iterator = e_set.iterator();
        while (iterator.hasNext()) {
            Map.Entry entry = (Map.Entry) iterator.next();
            //通过entry获取key和value
            Employee em = (Employee) entry.getValue();
            if(em.getSalary()>10){
                System.out.println(em);
            }
        }

    }
}
class Employee{
    private int number;
    private String name;
    private int salary;

    public Employee(int number, String name,int salary) {
        this.number = number;
        this.name = name;
        this.salary = salary;
    }

    public int getSalary() {
        return salary;
    }

    @Override
    public String toString() {
        return "number=" + number +
                ", name='" + name + ''' +
                ", salary=" + salary ;
    }
}