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

Learn seven advanced techniques for working with fields and methods in Java, including recursion, method call chaining, pass-by-value arguments, and rules for calling methods ...

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.

Get a deep dive into using method references in your Java programs, including stream operations, event listeners, and constructors and factories.