A small library of (hopefully) useful Java classes.

生成19位的Long ID、22位的短UUID、卡号、短卡号、带校验码卡号、激活码、付款码、数据加密、手机号加密、带失效时间的数字加密。生成器是分布式，支持多负载，无需数据库、redis或者zk作为ID分配的key。ID分配无需RPC调用，基于本地内存计算，结构简单，可靠性和性能比较高。

A contact list feature that I added to an Android app; used object-oriented programming

Minecraft library for contacting the Mojang API. Experimenting with Unit-Tests

A Java implementation of TypeID (Type-safe, K-sortable, globally unique identifier inspired by Stripe IDs).

A small Java API for generating unique identifiers of various types.

A UUID library for Java. Fully compliant with the new Internet standard published as RFC 9562. It was developed following the evolution of standard drafts.

Java Friendly Id for UUID

分布式ID生成器框架：超高性能的发号器框架。通过引入多种新的方案，彻底解决雪花算法的时间回拨等问题，并将雪花算法原生QPS提高最少十几~二十倍

Short UUID conversion and generation library for Java.

Java ULID implementation

安卓设备唯一标识解决方案，可替代移动安全联盟（MSA）统一 SDK 闭源方案。包括国内手机厂商的开放匿名标识（OAID）、海外手机平台的安卓广告标识（AAID），另外也提供了 IMEI/MEID、AndroidID、WidevineID、PseudoID、GUID 等常见的设备标识的获取方法。

Version 7 UUID generator

A simple Java application to convert Minecraft server player files between online and offline mode.

A REST API for generating IDs

compact Base64-first database-friendly UIDs

UUID implementation for Java including new draft variants

IDMask is a Java library for masking internal ids (e.g. from your DB) when they need to be published to hide their actual value and to prevent forging. It has support optional randomisation has a wide support for various Java types including long, UUID and BigInteger.

A Java library for generating Universally Unique Lexicographically Sortable Identifiers (ULID)

A Java implementation of K-Sortable Unique Identifiers (KSUID).