Java 21 SE

2023. 9. 19. Released.

• JEP 430: String Templates (Preview)
• JEP 431: Sequenced Collections
• JEP 439: Generational ZGC
• JEP 440: record 패턴(cf. Tuple)
• JEP 441: switch 패턴 매칭
• JEP 442: Foreign Function & Memory API (Third Preview)
• JEP 443: 무명 패턴과 변수 (Preview)
• JEP 444: 가상 스레드(Virtual Threads)
• JEP 445: 메인 메소드의 무명 클래스와 인스턴스 (Preview)
• JEP 446: Scoped Values (Preview)
• JEP 448: Vector API (Sixth Incubator)
• JEP 449: Windows 32-bit x86 Port deprecated for Removal
• JEP 451: Prepare to Disallow the Dynamic Loading of Agents
• JEP 452: Key Encapsulation Mechanism API
• JEP 453: 구조화된 동시성(Structured Concurrency) (Preview)

JEP 445

public class HelloWorld { 
    public static void main(String[] args) { 
        System.out.println("Hello, World!");
    }
}
 
// JEP 445
void main() {
    System.out.println("Hello, World!");
}