JavaWorld Core Java

• JDK 12 roadmap: The new features coming to Java 12 November 6, 2018
  The first beta builds—Build 18—of Java Development Kit (JDK) 12, the next version of Java SE, are now available from Oracle for Linux, Windows, and MacOS.To read this article in full, please click here(Insider Story)
• Java 101: Functional programming for Java developers, Part 1 October 30, 2018
  Java 8 introduced Java developers to functional programming with lambda expressions. This Java release effectively notified developers that it's no longer sufficient to think about Java programming only from the imperative, object-oriented perspective. A Java developer must also be able to think and code using the declarative functional paradigm.This tutorial presents the basics of functional […]
• Real-time data processing with data streaming: new tools for a new era September 27, 2018
  Today, there are many data sources—such at IoT devices, user interaction events from mobile applications, financial service transactions, and health monitoring systems—that broadcast critical information in real time. Developers working with these data sources need to think about the architecture to capture real time streaming data at varying scales and complexities.To read this article in full, […]
• Java Challengers #4: Comparing Java objects with equals() and hashcode() September 20, 2018
  In this Java Challenger you’ll learn how equals() and hashcode() combine to make object comparisons efficient and easy in your Java programs. Simply put, these methods work together to verify if two objects have the same values.  Without equals() and hashcode() we would have to create very large "if" comparisons, comparing every field from an […]
• What is the JRE? Introduction to the Java Runtime Environment September 11, 2018
  Together, the Java Development Kit (JDK), the Java Virtual Machine (JVM), and the Java Runtime Environment (JRE) form a powerful trifecta of Java platform components for developing and running Java applications. I've previously introduced the JDK and JVM. In this quick tutorial, you'll learn about the JRE, which is the runtime environment for Java.Practically speaking, a […]
• Java 101: Mastering Java exceptions, Part 2 August 21, 2018
  JDK 1.0 introduced a framework of language features and library types for dealing with exceptions, which are divergences from expected program behavior. The first half of this article covered Java's basic exception handling capabilities. This second half introduces more advanced capabilities provided by JDK 1.0 and its successors: JDK 1.4, JDK 7, and JDK 9. Learn […]
• What is the JDK? Introduction to the Java Development Kit August 9, 2018
  The Java Development Kit (JDK) is one of three core technology packages used in Java programming, along with the JVM (Java Virtual Machine) and the JRE (Java Runtime Environment). It's important to differentiate between these three technologies, as well as understanding how they're connected: The JVM is the Java platform component that executes programs. The […]
• Java Challengers #3: Polymorphism and inheritance July 19, 2018
  According to the legend Venkat Subramaniam, polymorphism is the most important concept in object-oriented programming. Polymorphism--or the ability of an object to execute specialized actions based on its type--is what makes Java code flexible. Design patterns like Command, Observer, Decorator, Strategy, and many others created by the Gang Of Four, all use some form of […]
• Java 101: Mastering Java exceptions, Part 1 June 26, 2018
  Java exceptions are library types and language features used to represent and deal with program failure. In the first half of this article you'll learn about basic language features and library types that have been around since Java 1.0. In the second half you'll discover advanced capabilities introduced in more recent Java versions. If you've […]
• Java 101: Datastructures and algorithms in Java, Part 5 June 8, 2018
  In Part 4, I introduced all the things you can do with singly linked lists and their algorithms in Java. While singly linked lists have many uses, they also present some restrictions. For one thing, singly linked lists restrict node traversal to a single direction: you can't traverse a singly linked list backward unless you […]