自己初始化 HashMap map; Set set = map.keySet(); Iterator it = set.iterator(); while(it.hasNext()){ map.get(it.next()); }
Map map = new HashMap(); map.set("a","b"); Iterator it = map.keySet().iterator(); while (it.hasNext()) { Object key =it.next(); System.out.println("key is "+key);// System.out.println("value is "+map.get(key));}
Sysytem.out.println(hashtable.get(key));
}
HashMap map;
Set set = map.keySet();
Iterator it = set.iterator();
while(it.hasNext()){
map.get(it.next());
}
map.set("a","b");
Iterator it = map.keySet().iterator();
while (it.hasNext()) {
Object key =it.next();
System.out.println("key is "+key);//
System.out.println("value is "+map.get(key));}
我看了API文档才知道的。本人也是新手,请指教