Capturing JVM- and application-level metrics. So you know what's going on.

JExplorer provides a convenient Java API for integrating Microsoft Internet Explorer into Java applications as a Java Swing UI component in headless mode, so you can embed it into the UI to manipulate programmatically without specific knowledge of COM or the Microsoft Internet Explorer API.

RXTX binary distribution for 64-bit windows

sqlite4java is a minimalistic Java wrapper for SQLite. SQLite is a free, compact, robust, embeddable SQL database engine. sqlite4java is built with the purpose to provide high-performance, low-garbage interface to SQLite for desktop Java applications.

sqlite4java is not a JDBC driver. Access to the database is made through the custom interfaces of com.almworks.sqlite4java package. Tighter integration with SQLite offers better performance and features not available through JDBC interfaces.

Download pages for older releases of JREs and JDKs. 

As part of the Java language, the java.lang package is implicitly imported into every Java program. This package's pitfalls surface often, affecting most programmers. This month, I'll discuss the traps lurking in the Runtime.exec() method.

 Many Java™ language methods, such as Thread.sleep() and Object.wait(), throw InterruptedException. You can't ignore it because it's a checked exception, but what should you do with it? In this month's Java theory and practice, concurrency expert Brian Goetz explains what InterruptedException means, why it is thrown, and what you should do when you catch one.

java resources

lots of in-depth info on developing in java

The Workspace Mechanic automates maintenance of your Eclipse environment by tweaking preferences, adding extension locations, and so on. You can use it to create a consistent environment among groups as large as the entire company, your local team, or even among your own many workspaces. Saves time setting up new workspaces.
Create tasks that ensure your favorite new preferences are applied to all your current and future workspaces. (This is one of our favorite features!)

Howto guide for read, modify and write XML documents with JAXB 2.1 or 2.2

helpful hints for running Tomcat in a production environment:

complete online book for development with maven

Excellent guide for building up useful project sites by adding the relevant information to your pom file.

compiles executable finite state machines from regular languages. Ragel targets C, C++, Objective-C, D, Java and Ruby. Ragel state machines can not only recognize byte sequences as regular expression machines do, but can also execute code at arbitrary points in the recognition of a regular language. Code embedding is done using inline operators that do not disrupt the regular language syntax. Ragel provides a very flexible interface to the host language that attempts to place minimal restrictions on how the generated code is integrated into the application. The generated code has no dependencies.

Java API that allows developers to easily monitor production applications. aggregate performance statistics such as hits, execution times (total, average, minimum, maximum, standard deviation), as well as concurrency information such as simultaneous application requests. Useful for web monitoring but also for general runtime statistics as well

WMS tiles cacheimplemented in Java

BUG is a collection of easy-to-use electronic modules that snap together to build any gadget you can imagine. Each BUGmodule represents a specific gadget function (ex: a camera, a keyboard, a video output, etc.). You decide which functions to include and BUG takes care of the rest, letting you try out different combinations quickly and easily. With BUG and the integrated programming environment/online community (BUGnet), anyone can build, program and share innovative devices and applications. We don’t define the final products – you do.

Java powered

MiGLayout can produce flowing, grid based, absolute (with links), grouped and docking layouts. MiGLayout is created to be to manually coded layouts what Matisse/GroupLayout is to IDE supported visual layouts.

GeoServer is a open source software server written in Java that allows users to share and edit geospatial data. Designed for interoperability, it publishes data from any major spatial data source using open standards. Supports export with KML

Binary web service protocol for transmitting data structures

DesignGridLayout is a LayoutManager inspired by the use of canonical grids for user interface design. DesignGridLayout works with JDK 1.5 and later.

List of currently available tools for static code analysis in Java along with notes on how they integrate with the major IDEs

Apache JMeter is a 100% pure Java desktop application designed to load test functional behavior and measure performance. It was originally designed for testing Web Applications but has since expanded to other test functions.

Java vector GIS viewer, reads out of PostGIS, WMS, and Others. Open Source

Prefuse supports a rich set of features for data modeling, visualization, and interaction. It provides optimized data structures for tables, graphs, and trees, a host of layout and visual encoding techniques, and support for animation, dynamic queries...

Netbeans property sheet design docs

SQL capabilities

EMMA is an open-source toolkit for measuring and reporting Java code coverage. EMMA distinguishes itself from other tools by going after a unique feature combination: support for large-scale enterprise software development while keeping individual developer's work fast and iterative. Every developer on your team can now get code coverage for free and they can get it fast!

Open source language for prototyping java graphics programs. Ought to be fun to try out

Setting up an applet JVM for remote debugging

Almost every application with GUI needs icons. And they better be sexy. And stylish. And consistent. And small. Here are few tips for programatically creating icons using Java 2D features

provides a common place for Swing developers to track inconsistencies in the Windows Look and Feel. Implements a supplamentary Windows Look & Feel that addresses a number of issues

Page with sample applet which determines if java plugin is properly installed

The JCCKit is a small (< 100Kb) library and a very flexible framework for creating scientific charts and plots.JCCKit is written for the JDK™ 1.1.8 platform (except of a Graphics2D renderer).

totally free layout manager based around row/column concept