本内容遵循CC 4.0 BY-SA版权协议 前阵子有位准备华为OD机试的读者问我一道题，说是C卷里的100分题，题干短到令人发指：给你一个整型数组，按每个元素的个位数从小到大排序。就这一句话，没有别的花哨修饰。但我拿这道题给几个学 Java 的朋友做了个小测试 ...

本内容遵循CC 4.0 BY-SA版权协议 很早之前我在代码评审里见过一段手动拷贝数组的逻辑，那位同事用for循环一格一格地搬数据，自己管理目标数组的长度，稍不留神就数组越界。我用Arrays.copyOfRange一行替换掉之后，他愣了半天，问我这个工具类到底是干嘛的。

An array in Java is a container object that holds a fixed number of values of a single type. The length of an array is established when the array is created and cannot be changed.

LeetCode刷题记录 - Java版. Contribute to XU-123-456-max/LeetCode-java development by creating an account on GitHub.

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