2024 is a great time to start working with Java, because 2023's Java 21 release has some amazing new features. Here's how to quickly download and install the Java 21 JDK.

How to install Java on your computer To run Java apps, open JAR files or compile some source code into bytecode you’ll need to install Java. To download and install Java on Windows, MacOS or Ubuntu, ...

You can check which Java version is on your Mac to see if you have the most up-to-date Java running, or you can check on the Java website.

To clear the Java cache, open the Java control panel, which you can find in the Windows Control Panel or in System Preferences on a Mac.