JAVA运行报错 [Ljava.lang.Object; cannot be cast to [Ljava.lang.String;

执行 String[] rwords = (String[]) list.toArray();

报错[Ljava.lang.Object; cannot be cast to [Ljava.lang.String; 这是强转的时候报错了，

改成 String[] words = (String[])(list.toArray(new String[ list.size()]));