Explore the power of JShell, an interactive Read-Execute-Print-Loop (REPL) for the Java Platform, in this comprehensive conference talk. Discover how JShell, targeted for JDK 9, enhances the Java programming experience by providing a powerful tool for learning, prototyping, and exploring new APIs. Learn to leverage JShell's tight integration with the Java compiler and virtual machine to speed up coding and interactively explore JDK 9 features. Gain insights into the JShell architecture and its implementation of advanced features like forward-referencing. Understand how the JShell API can be utilized to enhance other tools with just a few lines of code, making it an invaluable asset for Java developers and learners alike.