Download Java JDK:
- Visit https://www.oracle.com/java/technologies/javase-downloads.html
- Under "Oracle JDK" click on "JDK Download"
- Scroll down to "Java SE Development Kit 14.0.2"
- For a Mac, download "macOS Installer." For Windows, download "Windows x64 Installer."
- Install the software

IDEs:
- NetBeans : netbeans.org
- JCreator (simple to use IDE) : jcreator.en.softonic.com/download
- BlueJ (simple to use IDE) : bluej.org