Google has added Java 11 as a second-generation runtime on App Engine, the fully managed platform-as-a-service on Google Cloud. Second-generation runtimes on App Engine allow developers to use any version, framework, library, or binary of the supported language, whereas first-generation runtimes strictly limit these.
Java 11 is currently provided in a beta stage on App Engine, giving users access to the latest long-term support version of standard Java for deploying serverless applications. The second generation App Engine runtime for Java 11 is based on the gVisor container sandbox, which helps provide secure isolation for containers. The runtime also handles security tasks such as application and operating system security patches and updates.

