Changes with Java Main Method - In Java 25

 With   Java   25 , One  interesting  changes  can view  is  JEP 512, "Compact Source Files and Instance Main Methods," significantly simplifies the structure of simple Java programs, particularly for beginners or when writing quick scripts.

Traditional "Hello, World!" (Pre-JEP 512):

Java

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

"Hello, World!" with JEP 512 (Compact Source File):

Java

void main() {
    System.out.println("Hello, World!");
}

Key Changes Illustrated by the Example:

• No Explicit Class Declaration: 

  The HelloWorld class declaration is no longer required. The compiler implicitly creates a class for the source file.
• Simplified main Method Signature: 

  The public static void main(String[] args) signature can be reduced to simply void main(). The static keyword is no longer necessary as the runtime can now create an instance of the implicit class and invoke the main method as an instance method. 
• Reduced Boilerplate: 

  This change eliminates the need for boilerplate code associated with class and static method declarations, making Java more approachable for simple programs and scripting.

This simplification allows developers to focus directly on the core logic of their program without the overhead of traditional class structure for small, self-contained units of code.

References  from  Google Ai Review