Java 21 introduces unnamed classes and a new launch protocol (JEP 445) that dramatically reduce boilerplate, allowing a Hello World program to be written without public, static, or parameter declarations, making the language more beginner‑friendly.
JEP 445 introduces flexible main methods and anonymous main classes to streamline Java's entry point, removing unnecessary class, public, static, and argument requirements, thereby making the classic Hello, World! program far simpler for students and new developers.
OpenJDK's JEP 445 introduces a flexible main method and anonymous main classes to reduce boilerplate, making Java's entry point simpler and more beginner‑friendly while preserving full language capabilities for advanced development.
JEP 445 proposes flexible main methods and anonymous main classes to lower Java’s entry barrier, allowing non‑public or non‑static mains, omitting String[] args, and simplifying the classic Hello World example, with usage instructions for JDK 21 preview mode.
