Add Java 11 prerequisite
Add sentence that Java 11 is required to run and build Closure Compiler.
@@ -14,6 +14,9 @@ pitfalls.
## Getting Started
+Running Closure Compiler requires [Java 11](https://java.com). Ensure that
+you have Java 11 or newer installed.
+
The easiest way to install the compiler is with [NPM](https://npmjs.com) or
[Yarn](https://yarnpkg.com):
@@ -213,7 +216,7 @@ To build the compiler yourself, you will need the following:
Prerequisite | Description
-------------------------------------------------------------------------- | -----------
-[Java 8 or later](https://java.com) | Used to compile the compiler's source code.
+[Java 11 or later](https://java.com) | Used to compile the compiler's source code.
[Git](https://git-scm.com/) | Used by Bazel to download dependencies.
[Bazelisk](https://bazel.build/install/bazelisk) | Used to build the various compiler targets.
