[Rattled]

> Oracle has just open sourced the entire JDK.

Last time I had to download a JDK I got a warning about having to pay a license for commercial use. I think most enterprises care more about the licensing arrangement than access to the source.

[pron]

The licensing arrangement is that the JDK is now completely free (rather than mixed free/paid as before). Oracle offers the same JDK under two different license -- one, commercial, for those who wish to buy support, and one free. That page you went to described the two options, and referred you to the free one: http://jdk.java.net/

[makomk]

The "free one" that Oracle refer people to doesn't even come with a Windows installer, nor does it have any useful installation instructions. It's (presumably) intentionally unusable to all but the most persistent and technically knowledgeable users.

[watt]

You simply need to download from https://adoptopenjdk.net/

[makomk]

This seems to be the correct answer - it appears to be the only way of getting a properly working install of OpenJDK for Windows that will actually be found by other apps - but it's a third-party build of OpenJDK backed by most of the major Java supporters except Oracle.