import java.util.HashMap; import java.util.Iterator; import java.util.Map; import java.util.Set; public class map { public static void main(String[] args){ Map<Integer,String> map = new HashMap<Integer,String>(); method_2(map); } public static void method_2(Map<Integer,String> map){ map.put(3, "xiaoming"); map.put(8, "xiaoqiang"); map.put(5, "dazhang"); map.put(9, "wuming"); Set<Integer> keySet = map.keySet(); Iterator<Integer> it = keySet.iterator(); while(it.hasNext()){ Integer key = it.next(); String value = map.get(key); System.out.println(key+":"+value); } } }
3:xiaoming
5:dazhang
8:xiaoqiang
9:wuming