Abstract classes and interfaces in Java serve fundamentally different purposes. Learn the differences between these Java language elements and how to use them in your programs.

1. The Java compiler: javac. The javac utility is the most important command-line interface tool you will find in the JDK's bin directory. This is the Java compiler, and whether you use Maven, Gradle, ...

It is reproduced from the book Developing Scalable Series 40 Applications: A Guide for Java Developers, by Michael Juntao Yuan and Kevin Sharp. Topics Spotlight: AI-ready data centers ...