Learn the Eclipse Collections library by completing hands-on Java code katas.

We learn best by doing

What is Eclipse Collections?

Eclipse Collections is an open source Java collections library. Eclipse Collections has been evolving as a Java library since 2004. It was first released into open source as GS Collections in January 2012. …

Demonstrating ClassComparer, a utility class built with Eclipse Collections.

A challenge with rich APIs

Rich APIs can be great. They can significantly reduce the duplication of code by providing many useful common behaviors. Sometimes there are different implementations of classes that have a similar rich set of method signatures. …

Exploring the evolutionary design of parallelism in Eclipse Collections

Plenty of data, memory, and cores

In 2006, I was working on a proprietary distributed Java caching architecture in a large financial services company. We cached and indexed all of the firm’s trades and positions in a complex object graph in memory so we could slice and…

A poem

Background

I wrote this poem in 1988 and it was published in my high school literary magazine.

The Thrill of Conquest

Snowflakes drop upon our brows,
slush beneath our feet.
The air around us freezes the tips of our gloves;
Still, we are determined to conquer this last great mountain.
Just one foot in front of the…

What my cousin Chris taught me about living

It’s a Beautiful Day

I hope this story reminds you of one positive thing, every single day.

My cousin Chris passed away on September 28, 2012. This is the first time I am writing about him. I don’t really know what to write to be honest…

A blog about a lesser known Eclipse Collections method

What am I getting into now?

Eclipse Collections has a method named into that was added in the 8.0 release. The signature of into is defined as follows on the RichIterable interface.

A very short Java blog.

I’ve been writing haiku for the past month, to take a break from technical blog writing. I thought I would get back into writing technical blogs with a really short Java blog. The code example pictured about demonstrates the repeat method that was added to the String class in Java 11. The code above outputs the following.

A haiku

This is how many
Haiku I write before I
Write a new tech blog.

© Donald Raab

I have a week left to write a technical blog for September. Writing haiku has been a nice break for me since I wrote five technical blogs in August. I am driving to Maine this weekend and will hopefully find some inspiration for my next technical blog. Thank you for reading my haiku the past few weeks!