Map 데이터 출력방법

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


public class MapUtil {

	public static void main(String[] args) {

		Map map = new HashMap();
		map.put(1, "AAA");
		map.put(2, "BBB");
		map.put(3, "CCC");
		
		System.out.println("\n ##### 방법1 #####");
		for(int key : map.keySet()){
			System.out.println("key:"+key+" value:"+map.get(key));
		}
		
		System.out.println("\n ##### 방법2 #####");
		for(Map.Entry data : map.entrySet()){
			System.out.println("key:"+data.getKey()+" value:"+data.getValue());
		}
		
		System.out.println("\n ##### 방법3 #####");
		Iterator iterater1 = map.keySet().iterator();
		while(iterater1.hasNext()){
			int key = iterater1.next();
			System.out.println("key:"+key+" value:"+map.get(key));
		}
		
		System.out.println("\n ##### 방법4 #####");
		Set keySet = map.keySet();
		Iterator iterator2 = keySet.iterator();
		while(iterator2.hasNext()){
			int key = iterator2.next();
			System.out.println("key:"+key+" value:"+map.get(key));
		}
	}
}