arraylist中是一个自定义的数据结构： 我的问题是：如何先按类型再按ID，甚至再按数据1、数据2排序给这个list排序，有建议的朋友都有份。 comparator是一个接口，使用其排序时，只需要实现其方法然后调用**list.sort(new Comparator())**即可;collections.sort其实也是用的 ...

The Comparable interface is simple because it only has one method; however, implementing the compareTo method can become tedious if you need to sort your object by multiple properties (especially if ...

We start with how sorting algorithms work. Although you don’t need to implement sorting algorithms yourself, it’s useful to know how they work internally. You can skip to the next section if you just ...