Notes
Notes - notes.io |
* 1) compare实现了Comparator接口，compareTo实现了compareable接口。它们可以给对象和基本类型进行排序。给基本类型排序可以
* 直接调用Arrays.sort()和Conllections.sort()方法直接排序，默认是升序的。降序和对象排序需要重写相应的方法。
* 2) Collections.sort专门给List排序，而Arrays.sort专门给数组进行排序。
* Collections.sort排序底层调用的是Arrays.sort方法
* 3）Colletions.sort()实际会将list转为数组，然后调用Arrays.sort()，排完了再转回List。
* PS. JDK8里，List有自己的sort()方法了，像ArrayList就直接用自己内部的数组来排，而LinkedList, CopyOnWriteArrayList还是要复制出一份数组。
* 而Arrays.sort()，对原始类型(int[],double[],char[],byte[])，JDK6里用的是快速排序(quick sort)，对于对象类型(Object[])，JDK6则使用归并排序(merge sort)
* 4）https://www.cxyzjd.com/article/zz775854904/84791333 Arrays.sort和Collections.sort实现原理解析
*/
|
|
Notes.io is a web-based application for taking notes. You can take your notes and share with others people. If you like taking long notes, notes.io is designed for you. To date, over 8,000,000,000 notes created and continuing...
With notes.io;
- * You can take a note from anywhere and any device with internet connection.
- * You can share the notes in social platforms (YouTube, Facebook, Twitter, instagram etc.).
- * You can quickly share your contents without website, blog and e-mail.
- * You don't need to create any Account to share a note. As you wish you can use quick, easy and best shortened notes with sms, websites, e-mail, or messaging services (WhatsApp, iMessage, Telegram, Signal).
- * Notes.io has fabulous infrastructure design for a short link and allows you to share the note as an easy and understandable link.
Fast: Notes.io is built for speed and performance. You can take a notes quickly and browse your archive.
Easy: Notes.io doesn’t require installation. Just write and share note!
Short: Notes.io’s url just 8 character. You’ll get shorten link of your note when you want to share. (Ex: notes.io/q )
Free: Notes.io works for 12 years and has been free since the day it was started.
You immediately create your first note and start sharing with the ones you wish. If you want to contact us, you can use the following communication channels;
Email: [email protected]
Twitter: http://twitter.com/notesio
Instagram: http://instagram.com/notes.io
Facebook: http://facebook.com/notesio
Regards;
Notes.io Team
