JavaWorld:Hands-on, how-to features and columns by Java experts; news; Java applets; sample code; tips.
Absolute Java FAQ's Daily Tips: Publishes daily Java tips on the site and in newsletter (twice a week). The number of published tips exceeds 900.
Builder.com - Java: Java-related articles within CNET Networks.
C/C++ Users Journal - Java Solutions supplement: Bi-monthly supplement provides working solutions for advanced Java programmers.
Gamelan.com Java Journal: Features tutorials and articles from Java developers.
Java Coffee Break: A free guide to the world of Java programming, packed full of free articles, tutorials, book reviews, and FAQs.
Java Developer's Journal: Features a small selection of online articles from their print magazine
Java Newsletter Back Issues: Back issues of Glen McCluskey's Java newsletters, containing articles, tips, and resources.
Java Pro Magazine: Includes articles from print magazine, newsletter registration, as well as source code from articles.
Java Skyline: An online magazine for Java Server Developers.
Objective Viewpoint: Regular column in ACM Crossroads magazine, featuring articles about programming in Java (currently) and C++ (in the past).