JavaWorld Core Java

• Java 101: Datastructures and algorithms in Java, Part 1 August 10, 2017
  Datastructures and algorithms are essential to computer science, which is the study of data, its representation in memory, and its transformation from one form to another. In programming, we use datastructures to store and organize data, and we use algorithms to manipulate the data in those structures. The more you understand about datastructures and algorithms, […]
• 21 technologies transforming software development August 3, 2017
  A long time ago, developers wrote assembly code that ran fast and light. On good days, they had enough money in their budget to hire someone to toggle all those switches on the front of the machine to input their code. On bad days, they flipped the switches themselves. Life was simple: The software loaded […]
• Web services in Java SE, Part 1 July 21, 2017
  Java Standard Edition (SE) 6 included support for Web services. This post begins a four-part series on Web services in Java SE by explaining what Web services are and overviewing Java SE's support for them. Future posts will use this support to build SOAP-based and RESTful-based Web services, and will also cover advanced Web service […]
• 21 rules for faster SQL queries July 20, 2017
  Everyone wants faster database queries, and both SQL developers and DBAs can turn to many time-tested methods to achieve that goal. Unfortunately, no single method is foolproof or ironclad. But even if there is no right answer to tuning every query, there are plenty of proven do’s and don’ts to help light the way. While […]
• Luna brings visual development to functional programming July 6, 2017
  Described by the creators as a developer’s whiteboard “on steroids,” the Luna functional language promises to enable application assembly by clicking and dragging visual elements together.Expected to be released as open source when Luna reaches beta, its compiler will produce native code for the developer’s choice of Linux, MacOS, Windows, or JavaScript. The team behind […]
• Java library evolution and other puzzlers July 4, 2017
  Exploring puzzling code to figure out why it doesn't do what seems obvious is one way to improve your programming skills. In this post, I introduce you to various Java-oriented puzzlers from Jens Dietrich, Joshua Bloch and Neal Gafter, and myself.Java Library Evolution Puzzlers Q: What is the Java Library Evolution Puzzlers?A: The Java Library […]
• The road to Java 9: Only critical bugs getting fixed now June 23, 2017
  With the initial release candidate build for Java 9 now published, Oracle has proposed that from here on out, only “showstopper” bugs be fixed for the production Java 9 release, which is due September 21.The proposal floated this week represents a further tightening up of bug-fixing goals for RDP (Rampdown Phase) 2 of the Java […]
• JVM may get upgrade to support today’s multicore processors June 20, 2017
  Oracle is proposing an update to the Java Virtual Machine to allow for direct-value class types, a modernization required by the advent of multicore processors. There is no schedule for when the changes might appear in the JVM.The changes to the JVM specification would support a prototype of value classes—classes for which primitive-like non-reference value instances […]
• Type dependency in Java, Part 2 June 13, 2017
  Understanding type compatibility is fundamental to writing good Java programs, but the interplay of variances between Java language elements can seem highly academic to the uninitiated. This two-part article is for software developers ready to tackle the challenge! Part 1 revealed the covariant and contravariant relationships between simpler elements such as array types and generic […]
• Primer: Make sense of cognitive computing June 5, 2017
  If you’ve been seeing the word “cognitive” a lot lately, you’re not alone. And if you’re confused about exactly what it means from an IT and business perspective, you’re not alone in that either.To help provide some clarity around the cognitive concept and what it might mean for your organization, I’ve put together this primer.What […]