[자바 소스] HashMap의 기본 사용, 이터레이터 구현

import java.util.*;

class Ex107_HashMap 
{
	public static void main(String[] args)
	{
		//Ex107_HashMap.java
		//	- HashTable, HashSet, HashMap, Dictionary
		m3();
	}//end main

	public static void m1() {
		HashMap< String,String> list = new HashMap< String,String>();
		//HashMap< key의 자료형, value의 자료형>

		//데이터 삽입
		list.put("apple", "사과");	//put(key,value)
		list.put("dog", "강아지");
		list.put("cat", "고양이");
		list.put("java", "자바");	

		System.out.println(list.size());

		System.out.println(list.get("dog"));
		System.out.println(list.get("cat"));
	}//end m1()

	public static void m2() {
		HashMap< Integer,String> list = new HashMap< Integer,String>();

		list.put(1,"하나");
		list.put(2,"둘");
		list.put(3,"셋");

		System.out.println(list.get(1));	//index(x) -> key(o)

	}//end m2()

	public static void m3() {
		HashMap< String,Boolean> list = new HashMap< String,Boolean>();

		list.put("홍길동",true);
		list.put("아무게",true);
		list.put("하하하",false);
		list.put("호호호",true);
		list.put("이순신",false);

		Set< String> set = list.keySet();
		Iterator< String> iter = set.iterator(); //이터레이터 구현
		
		while (iter.hasNext()) {
			String key = iter.next();
			System.out.println(key);

			System.out.println(list.get(key));
		}

	}//end m3()

}