墙头一颗草

array开销小，长度初始化时必须就确定。list 长度可变，删除与增加很方便。array定义： String [] strs= new String[5];//strs=={"a","d","e","df","dfg"} 错误 或者 String [] strs={"a","d","e","df","dfg"} //注意{}整体赋值，只能用在初始化时list定义： List<Object& Read More