You don't need to install Java. It's bundled. In fact I'd recommend that you don't even install Bazel itself. Instead, install this: https://github.com/bazelbuild/bazelisk. This will install either the latest Bazel for you automatically, or you can pin a version of Bazel you want in each repository, to limit and control build system churn.
It's funny how Java people always marketed Java as "write once, run everywhere" and they often bundle compatible platform-dependent JRE with platform-specific plugins. ^_^
