Jeff Friesen

Jeff Friesen is a freelance tutor and software developer with an emphasis on Java and Android. In addition to writing Java and Android books for Apress, Jeff has written numerous articles on Java and other technologies for JavaWorld, InformIT, Java.net, and SitePoint. Jeff can be contacted via his website at TutorTutor.ca.

Java 101: The next generation: The essential Java language features tour, Part 5

The ultimate superclass, Part 3

This post completes a three-part series in which I present and answer questions about Object and its methods.

Java 101: The next generation: The essential Java language features tour, Part 4

Java 101: The next generation: The essential Java language features tour, Part 4

Project Coin was the Java 7 language update that emphasized small changes with a big impact. Get a primer on automatic resource management with try-with-resources, then zip through three more JDK 7 updates: switch-on-string,...

The ultimate superclass, Part 2

The ultimate superclass, Part 2

Java beginners are invited to dig deeper into Java's ultimate superclass with this introduction to Object's finalize(), getClass(), and hashCode() methods.

Java 101: The next generation: The essential Java language features tour, Part 3

Get introduced to the last but not least of new features that have improved Java's productivity since JDK 5: Autoboxing and unboxing, the enhanced for loop, static imports, varargs, and covariant return types.

The ultimate superclass, Part 1

This post launches a three-part series in which I present and answer questions about Object and its methods.

Java 101: The next generation: The essential Java language features tour, Part 2

Learn how to use typesafe enums in switch statements, then get started with Java annotations and meta-annotations types like Target, which can clarify the meaning of annotations in your Java code.

Java Library Evolution Puzzlers

Exploring puzzling code to figure out why it doesn't do what seems obvious is one way to improve your programming skills. Java gurus Joshua Bloch and Neal Gafter took this tactic to heart when they wrote the popular Java Puzzlers...

Reading and Writing Excel Spreadsheets

The open source community has created many open source Java projects, which range from charting software to game frameworks to word processors. In this post, I introduce an open source library project for reading and writing Microsoft...

Useful Utility Applications

Simple utility applications can be very helpful to Java developers. For example, you might need an application that generates a hexadecimal listing of a binary file.

Transience

The Java language's transient keyword isn't as well known as for , class , synchronized , and other familiar keywords; which makes it a perfect candidate for inclusion in a job interview questionnaire.

Java 101: The next generation: The essential Java language features tour, Part 1

From assertions in JDK 1.4 to the forthcoming lambdas in Java 8, the Java language has evolved considerably since its inception. The next several articles in Java 101: The next generation present a toolbox of essential Java...

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