hasshmap输出value

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


public class zengzhiwei {
    public static void main(String agrs[]) {
        System.out.println("hello world!");
        Map<String, String> m = new HashMap<String, String>();
        m.put("zengzhiwei", "zzw");
        m.put("zengzhijie", "zzj");
    
        Set<String> s = m.keySet();
        Iterator<String> itr = s.iterator();
        while(itr.hasNext()) {
            Object o = itr.next();
            System.out.println(m.get(o));
        }
        
    }

}