[转]Arrays.asList()陷阱

public class ArrayASListTest
{
     public static void main(String[] args)
    {
          /*
          String[] s = new String[]{"one","two"};
          List wrongList = Arrays.asList(s);
          wrongList.remove(0);
          */
       

        String[] s = new String[]{"one","two"};
        List rightList = new ArrayList(Arrays.asList(s));
        wrongList.remove(0);
   }
}

Arrays.asList()生成的List是java.util.Arrays$ArrayList，它的remove和add实现就是抛出UnsupportedOperationException异常。

改正方法也很简单，换成ArrayList或者LinkedList就可以了

转自：http://blog.csdn.net/yinbodotcc/archive/2009/02/18/3907292.aspx

 

 

其实API里也说明清楚了：

Returns a fixed-size list backed by the specified array. (Changes to the returned list "write through" to the array.)

如果仔细看，应该也能避免错误