Checking What Version of Java You Have Installed

To see what version of Java you have installed, or if you even have a version of Java installed, do the following:

  • Open a command prompt (terminal on mac):
    • On Windows click the Start or Windows button and type: cmd
      • You should see something called “Command Prompt”, open this.
    • On Mac use Finder to search for “Terminal”, and open it.
  • In the command prompt (or terminal) enter the following command and hit Enter:
    • java -version
    • That’s “java”, followed by a space, followed by “-version”.
  • This will produce a message which either shows you what version of Java you have, or an error message like “unknown command: java”, or something like that.
  • If you have Java installed, you’ll see a message something like this:
Installed Java Version Message

Installed Java Version Message


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