JEP 512, Compact Source Files and Instance Main Methods, has been integrated for JDK 25 after a four-round preview cycle starting from JDK 21.
This evolution introduces features like Compact Source Files, flexible instance main methods, java.lang.IO class, and automatic imports for core libraries to simplify Java programming.
Instance main methods allow for non-static entry points, making it easier for beginners to write Java programs without the need for explicit class declarations.
The finalization of these features aims to reduce the learning curve and streamline small program development in Java, maintaining compatibility and integration with the standard Java toolchain.