To check the version of Java installed on your system using the Command Prompt (CMD), you can use the java command with the -version option. Here’s how you can do it:

1. Open Command Prompt:

   • On Windows, press Win + R, type cmd, and press Enter to open the Command Prompt.

2. Check Java Version:

   • In the Command Prompt, type the following command and press Enter:
     
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     java -version


3. View Java Version Information:

   • The command will display information about the Java version installed on your system, including the version number and other details.

   Example output:

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   java version "1.8.0_311"
Java(TM) SE Runtime Environment (build 1.8.0_311-b11)
Java HotSpot(TM) 64-Bit Server VM (build 25.311-b11, mixed mode)


   The first line shows the Java version, in this case, “1.8.0_311.”

This command will work if Java is properly installed and configured on your system and if the java command is included in your system’s PATH environment variable. If Java is not installed or not configured correctly, you may need to install it or set up the PATH variable accordingly.