But as of April 16th, 2019 the license that Oracle use for java has changed. Previously you could download and install the java versions and run them on your Pc, servers etc and not worry too much about the license. If you click on the JDK Download button you will be presented with a page similar to below The Oracle JDK Licence has changed These are useful for end user machines or servers where there is no need to change the ode, just run the applications. The JDK is what we are interested in, but there are also runtime version which allow you to run but not modify the java code. If you click on the learn more option it will take you to a page that details all the updates (usually bug and security fixes) since JDK 8 was released. What this is referring to is Java SE 8u221 or Java Standard Edition update 221. Theres quite a bit going on here so lets take the time to explain. You should see a section on the page similar to the below.

Navigate to and scroll down till you get to the Java SE 8 version.