字符串实现 CharSequence 界面。 CharSequence由String实现，但也有CharBuffer，Segment，StringBuffer，StringBuilder。

String implements the CharSequence interface. CharSequence is implemented by String, but also CharBuffer, Segment, StringBuffer, StringBuilder.

所以String []和CharSequence []基本相同。但是CharSequence是抽象，String是实现。

So a String[] and a CharSequence[] is essentially the same. But CharSequence is the abstraction, and String is the implementation.

顺便说一下，'[]'表示对象的数组。所以 String [] 是一个字符串数组。而String本身就是一个字符数组。

By the way, '[]' denotes an array of objects. So String[] is an array of strings. And String itself is an array of characters.