下面答案可能正确的是
import java.util.Hashtable; import java.util.Iterator; import java.util.Map; public class NowCoder { public static void main(String[] args) { String key = null; Integer value = null; Hashtable table = new Hashtable(); key="3";value=4; table.put(key, value); key="2";value=2; table.put(key, value); key="3";value=2; table.put(key, value); iteratorEntryset(table); } private static void iteratorEntryset(Hashtable table) { if (table == null) return ; String key = null; Integer integer = null; Iterator iter = table.entrySet().iterator(); while(iter.hasNext()) { Map.Entry entry = (Map.Entry)iter.next(); key = (String)entry.getKey(); integer = (Integer)entry.getValue(); System.out.println(key+" -- "+integer.intValue()); } } }