hasshmap输出value

 1 import java.util.HashMap;
 2 import java.util.Iterator;
 3 import java.util.Map;
 4 import java.util.Set;
 5
 6
 7 public class zengzhiwei {
 8     public static void main(String agrs[]) {
 9         System.out.println("hello world!");
10         Map<String, String> m = new HashMap<String, String>();
11         m.put("zengzhiwei", "zzw");
12         m.put("zengzhijie", "zzj");
13
14         Set<String> s = m.keySet();
15         Iterator<String> itr = s.iterator();
16         while(itr.hasNext()) {
17             Object o = itr.next();
18             System.out.println(m.get(o));
19         }
20
21     }
22
23 }