Say goodbye to the public static void main method in Java 21 with the unnamed classes and instance main methods preview features.

This Java tip introduces additional concepts and techniques related to fields and methods–namely field constants, field-access rules, chaining instance method calls, pass-by-value arguments ...

Rather than use an instance "s" of a String object to call the static method valueOf (), it's preferrable to use the classname to make the call, as in String.valueOf ()<BR>Hope this helps.

Method references in Java are part of the broader set of features introduced and enhanced in Java 8 and beyond. They are a concise way to refer to methods of classes or objects.