package study;

import java.util.HashMap;

import java.util.Iterator;

import java.util.Map;

import java.util.Set;

public class PropertyTest {

public static void main(String[] args) {

Map<Integer,String> map=new HashMap<Integer,String>();

map.put(1, "aa");

map.put(2, "bb");

map.put(3, "cc");

Set<Integer> set=map.keySet();

for(Iterator<Integer> iter=set.iterator();iter.hasNext();){

Integer key=iter.next();

String value=map.get(key);

System.out.println(key+"-->"+value);

}

System.out.println("-------------------");

Set<Map.Entry<Integer, String>> set2=map.entrySet();

for(Iterator<Map.Entry<Integer, String>> iter=set2.iterator();iter.hasNext();){

Map.Entry<Integer, String> entry=iter.next();

Integer key=entry.getKey();

String value=entry.getValue();

System.out.println(key+"--->"+value);

}

}

}