If you are needing to download Java, start by following this link to the Java web page: https://java.com/en/
Once on the home screen of their website, start by clicking "Free Java Download".
After clicking this, you will need to click "Agree and Start Free Download" after viewing the end user license agreement.
Once you click this, a pop-up should appear asking if you would like to save the file. Click on "Save the File".