Some options for those who prefer to avoid the Oracle minefield: https://adoptium.net https://aws.amazon.com/corretto https://www.azul.com/downloads https://bell-sw.com/pages/downloads Sadly, no-one has managed to package it yet, but we should get something in the next couple of days. Since 21 is an "LTS" release, major Linux distributions will provide a runtime pretty soon. Ubuntu backports them to old releases too. - Source: Hacker News / 9 months ago

Also, make sure you're either in compliance with Oracle's licensing requirements or download an OpenJDK version. I'm partial to Azul Zulu with JFX for desktop work, and use Amazon Corretto as the base image for containerized applications. Source: over 1 year ago

Java is not a program, but an entire programming language. I use it for a lot of high performance web servers (via Spring Webflux and Eclipse Vert.x) on most of my projects. To run any piece of Java code, what you'll need is the JRE / JDK (Java Runtime Environment / Java Development Kit). I would recommend going with OpenJDK and installing from Eclipse Termium or Amazon Corretto (make sure to install Java 17). Source: over 1 year ago

To "live DJ" there's the extremely famous https://virtualdj.com/ To create prerecorded DJ sets https://www.mixmeister.com/ Been using both for at least 10 years, love them both. - Source: Hacker News / 6 months ago

Not open source, but free for "home use" https://virtualdj.com/. - Source: Hacker News / 6 months ago

I started with Virtual DJ to get used to the software latency (I came from turntables) and get my muscle memory on button locations (which is why I stayed with the same brand). VDJ has every feature you need. The software is free to use without a controller from virtualdj.com. Source: almost 2 years ago

A lot of the places that do it from scratch I notice use https://virtualdj.com/. Source: almost 2 years ago

DJ software, like VirtualDJ will have features that are more conducive to what you're trying to do, like live looping functions that help you lock the loop to the beat. It's also cheaper (free for non-commercial use without a hardware controller) than QLab, and it's cross-platform (QLab is Mac-only, if that matters). Source: about 2 years ago