This post explains how to install Java or check which version is running on your machine. Install on any OS, and learn about the JDK.

Ryan Ariano/Business Insider 4. After clicking on "Java," it will let you know that the Java Control Panel opens in a separate window. 5. In the Java Control Panel, click on "General." 6.

Each version will be associated with a number, starting with 0. If you want to switch to Java 18, locate and type the associated number for Java 18 and hit Enter on your keyboard.

Every three years there will be an LTS release of Java that receives long-term support from Oracle. The most recent LTS release is Java 11, with forthcoming Java 17 also expected to be an LTS version.