java数组英文：Arrays
存储相同数值的集合的数据结构
An array is a data structure that stores a collection of values of the same type. You access
each individual value through an integer index. For example, if a is an array of integers, then
a[i] is the ith integer in the array.
Array 类
Array 类提供了动态创建和访问 Java 数组的方法。