Java has been leading for more than 20 years. However, Java is also famous as a technology for building big enterprise backend systems, for its heavy-weight Java Enterprise application servers, for its slow startup time, high memory consumption, highly complex data persistence and thus all in all to be a legacy monolithic technology. Now, the cloud age has begun and the cloud changes everything. Today, users want decoupled microservices, highly cost-efficient elastic scalable serverless infrastructure and approprieted cloud-native multi model data storage. That sounds like the opposite of Java. So, do we have to put up with it that Java has now become a legacy technology or is there a plan B for Java in the cloud? No worries, the holy grail was already found. A completely new Java stack has been developed to build real cloud-native apps with Java: fast and cost-efficient Microservices written in Java using micro Java runtimes with all benefits of former application servers, but millisecond startup-time at low memory consumption, in-memory multi-model data processing, microsecond response- and query-time at lowest data storage cost paird with the powerful Java ecosystem - features that will convince users and make Java leading also in the cloud. That's not a vision, it's reality already. In this session, you will learn how to build ultra-fast cloud-native apps and microservices with core Java and modern Java micro runtimes.