There are 2 repositories under java-api topic.
A list of useful Java frameworks, libraries, software and hello worlds examples
Writing SQL using Java syntax
An API for travel management. It is built with Java, Spring Boot, and Spring Framework. A toy-project to serve as a theoretical basis for the Medium series of articles I wrote about Java+Spring.
TotalCross is a Software Development Kit that helps cross platform application development. Currently supported platforms are: Windows, Wince, Android, iOS, Linux and Linux ARM for embedded systems.
JLaTexMath for Android 完美支持、数学、物理、化学公式、汉字解析、图文混排、Mathml、LaTex
A Java API for Developing Automated Trading Applications for the Equity, Futures, and Currency Markets
This Java API provides an easy-to-use way to store data and provide configurations using the YAML format.
中泰证券xtp java api for win\linux\mac
GeoPackage Java Library
Java API for Airtable (http://www.airtable.com)
Implementation of java locale for scala.js
RadioBrowser Java API library
Java Telegram Bot API
Google Search Results JAVA API via SerpApi
GeoPackage Core Java Library
A java API for MiLight light bulbs. Other brands of light bulbs are also compatible, for instance EasyBulb, LimitlessLED, etc.
A Java API for the yahoo weather service
Java API implementation for Schoology (https://schoology.com)
Simple Features Well-Known Binary Java Library
The simplest payment processing Java library in the world. Unifies PayPal and Stripe into one API. Supports both regular payments and subscriptions, with NO need of handling json, requests, storage into a database yourself.
Java API for the online speech recognition services provided by phon.ioc.ee
Compares of Java Collections and Objects (of different classes) made easy