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

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

The former method is executed by default methods a() and b(), and the latter method is executed by static method d(). Compile Listing 21 (javac PMDemo.java) and run the application (java PMDemo).

This post explains how to call a method in Java. Learn how to define methods, call them from other classes, and pass arguments!