Java中的equals vs Arrays.equals

equals vs Arrays.equals in Java(Java中的equals vs Arrays.equals)

问题描述

在Java中比较数组时，下面2个语句有区别吗?

When comparing arrays in Java, are there any differences between the following 2 statements?

Object[] array1, array2;
array1.equals(array2);
Arrays.equals(array1, array2);

如果是这样，它们是什么?

And if so, what are they?

推荐答案

array1.equals(array2) 和 array1 == array2 一样，即是相同的数组.正如@alf 指出的那样，这不是大多数人所期望的.

array1.equals(array2) is the same as array1 == array2, i.e. is it the same array. As @alf points out it's not what most people expect.

Arrays.equals(array1, array2) 比较数组的内容.

同样array.toString()可能不是很有用，需要使用Arrays.toString(array).

Similarly array.toString() may not be very useful and you need to use Arrays.toString(array).

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