I wrote a promise library for java and kotlin. It's easier to use and lightweight, checkout at https://pro4j.com/. - [Quick start](https://pro4j.com/quickstart.html) - [Code and examples](https://github.com/pro4j/promise) - [Android examples](https://github.com/pro4j/promise/blob/master/apps/app-marbles/src/main/java/com/pro4j/marbles/MainActivity.java#L29) - [Java examples](https://github.com/pro4j/promise/blob/master/promise/src/test/java/com/pro4j/promise/MemoryModelTest.java#L37) - [Kotlin examples](https://github.com/pro4j/promise/blob/master/promise/src/test/kotlin/com/pro4j/promise/KtBasicTest.kt) - [Java Extension](https://github.com/pro4j/promise/blob/master/promise/src/main/java/com/pro4j/promise/PromiseExtJ.java) - [Kotlin Extension](https://github.com/pro4j/promise/blob/master/promise/src/main/kotlin/com/pro4j/promise/extension.kt)

I wrote a promise library for java and kotlin. It's easier to use and lightweight, checkout at https://pro4j.com/. - [Quick start](https://pro4j.com/quickstart.html) - [Code and examples](https://github.com/pro4j/promise) - [Android examples](https://github.com/pro4j/promise/blob/master/apps/app-marbles/src/main/java/com/pro4j/marbles/MainActivity.java#L29) - [Java examples](https://github.com/pro4j/promise/blob/master/promise/src/test/java/com/pro4j/promise/MemoryModelTest.java#L37) - [Kotlin examples](https://github.com/pro4j/promise/blob/master/promise/src/test/kotlin/com/pro4j/promise/KtBasicTest.kt) - [Java Extension](https://github.com/pro4j/promise/blob/master/promise/src/main/java/com/pro4j/promise/PromiseExtJ.java) - [Kotlin Extension](https://github.com/pro4j/promise/blob/master/promise/src/main/kotlin/com/pro4j/promise/extension.kt)