java中的二维数组 [英] Two dimensional arrays in java

问题描述

Which two statements are true for a two-dimensional array of primitive data type?
A. It cannot contain elements of different types.
B. The length of each dimension must be the same.
C. At the declaration time, the number of elements of the array in each dimension must be specified.
D. All methods of the class object may be invoked on the two-dimensional array.

我是什么尝试过：



回答：

A和D



有人可以解释为什么D是正确的选项吗？

What I have tried:

answer:
A and D

Could anyone explain why D is the correct option?

推荐答案

因为元素的来源无关紧要：一旦你有了实例，你可以做任何事情该类允许使用它。

Because it doesn't matter where the element comes from: once you have the instance you can do anything that the class permits with it.

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