【Map】Map.Entry的使用

import java.util.HashMap;
import java.util.Iterator;
import java.util.Map;
import java.util.Set;
import java.util.Map.Entry;


public class Test2 {

	public static void main(String[] args) {
		HashMaphashMap=new HashMap();
		hashMap.put(new Person("jingtianxiaozhi1",21),"beijing");
		hashMap.put(new Person("jingtianxiaozhi3",23),"qingdao");
		hashMap.put(new Person("jingtianxiaozhi2",22),"jinan");
		hashMap.put(new Person("jingtianxiaozhi4",24),"nanjing");
		Set> entry=hashMap.entrySet();
		Iterator>iterator=entry.iterator();
		while(iterator.hasNext())
		{
			System.out.println(iterator.next().getKey().getName());
		}
	}
}
class Person{
	private String name;
	private int age;
	
	public Person(String name, int age) {
		super();
		this.name = name;
		this.age = age;
	}
	public String getName() {
		return name;
	}
	public void setName(String name) {
		this.name = name;
	}
	public int getAge() {
		return age;
	}
	public void setAge(int age) {
		this.age = age;
	}
	
}