Java used to be deeply embedded in OS X, but in recent versions of the OS it's an optional install. Here is how to check to see if it is installed, and how to disable or remove it.

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.

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 you want to download and install Java JDK 18 on Windows 11/10 computer, you will also have to set up a Path in Environment Variable.

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.

When you install Java on a Windows PC for the first time, the installer includes this step, which I’ve previously documented: Notice how the check box for that Ask toolbar is selected already.

Here are the three easiest ways to fix Java’s “not recognized as an internal or external command” error: Install or reinstall Java and the JDK on your computer Add Java’s bin directory to the computer ...

Windows users can check for the program in the Add/Remove Programs listing in Windows, or visit Java.com and click the “Do I have Java?” link on the homepage.