This article introduces Java's interactive programming environment, explains how to launch JShell, demonstrates calculations, variable and function definitions, class creation, and covers essential commands like /help, /list, /edit, /drop, /save, /open, /reset, /imports, /types, and /exit for efficient REPL usage.
This article explores advanced JShell features—including variable re‑declaration, temporary variables, forward references, exception handling, session persistence, external library usage, command shortcuts, code completion, editing constructs, and programmatic API access—providing practical examples and tips for rapid Java development within the REPL environment.
The article introduces Apache NetBeans IDE 9.0, released after Oracle’s code donation, highlights its main goals of IP cleanup and Java 9/10 support, details new IDE features such as var type inference, Jigsaw modularity, and Java Shell, and presents the community acceptance survey results and download links.
JDK 9 adds a range of language and runtime enhancements—including a new module system, JShell REPL, upgraded Stream API, HTTP client, and internal changes to strings and exception handling—to improve modularity, performance, and developer productivity across Java applications.
