java Arrays.asList用法

java Arrays.asList用法

用途

Arrays是java容器相关操做的工具类，asList方法将Array转换为list，是Array和List之间的桥梁。

注意

Arrays.asList返回一个基于参数array的fixed list，即不能对返回的list进行修改操做，如删除操做、增长操做等。若是想得到可修改的List，那么可采用以下方式操做：

new ArrayList<Integer>(Arrays.asList(arr))
注：then you create new ArrayList, which is a full, independent copy of the original one. Although here you create the wrapper using Arrays.asList as well, it is used only during the construction of the new ArrayList and is garbage-collected afterwards. The structure of this new ArrayList is completely independent of the original array. It contains the same elements (both the original array and this new ArrayList reference the same integers in memory), but it creates a new, internal array, that holds the references. So when you shuffle it, add, remove elements etc., the original array is unchanged.

new LinkedList<Integer>(Arrays.asList(arr))
注：LinkedList支持更快的remove操做。