What Is Amazon Corretto 11? Amazon Corretto is a no-cost, multiplatform, production-ready distribution of the Open Java Development Kit (OpenJDK). Corretto comes with long-term support that includes performance enhancements and security fixes. Corretto is certified as compatible with the Java SE standard and is used internally at Amazon for many production services. With Corretto, you can develop and run Java applications on operating systems such as Amazon Linux 2, Windows, and macOS. This guide includes a list of patches applied to the OpenJDK for this release of Amazon Corretto 11, and installation instructions for the platforms supported by this version.