[Java Programming Proficiency Test Grade 2] Problem Collection | 60 Original Multiple-Choice Questions with Explanations for All Options

Verify your understanding of the grammar, object-oriented programming, exceptions, and collections covered in the Java ...

Things to Know Before Starting Java: From Environment Setup to Your First Step

From Environment Setup to Your First Step"I want to start programming, but where should I begin?"For those of you asking this ...
InfoWorld

When to use abstract classes vs. interfaces in Java

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. Abstract classes and ...
Ars Technica

How can I bundle a Java program into an executable file format?

I'm taking an introductory Java programming class right now and I'm looking for a way to compile, or bundle my program into an executable file - similar to how Visual Studio created an executable when ...
InfoQ

Java Feature Spotlight: Sealed Classes

The release of Java SE 15 in Sept 2020 will introduce "sealed classes" (JEP 360) as a preview feature. A sealed class is a class or interface which restricts which other classes or interfaces may ...
MUO on MSN

Java has been on your computer your whole life and here's what it actually does

That old Java icon had a much bigger résumé than I gave it credit for.