package hb;import java.util.HashMap;import java.util.Iterator;import java.util.Map;import java.util.Set;public class TestMap {public static void main(String[] args) {Map map = new HashMap();for(int i=0;i<5;i++){map.put("key"+i, "value"+i);}Set set = map.keySet();System.out.println(" size---- " + set.size());Iterator it = set.iterator();while(it.hasNext()){String key = (String)it.next();System.out.println(key);System.out.println(map.get(key));if(key.equals("key4")){it.remove();}}System.out.println(" size---- " + map.size());map.remove("key2");System.out.println(" size---- " + map.size());}}
