The portal provides you different ways and means by which you can come to know the current Java version. Apart from the above sites, you can also detect Java using the Windows command prompt. To ...

Java Tester: This site contains all the resources you will need to verify your currently installed Java version. Java Tester also gives you tips to detect Java versions on Mac computers as well.

If Java is not recognized as internal or external command, you need to make sure that the installation is not problematic and its path is recognized as system variables.

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.

Which version of Java should you use in Linux? Learn how to easily switch between different versions with a tutorial from Jack Wallen.