I saw most of the people, including me, using ArrayList and HashMap only in their project. I was surprised why the Java provided us so many varieties of collection classes if we are done with only these two.

Since I was not interested to read a whole book for this so I made a doodle chart (cheat sheet, decision chart and short notes) that you can hang to your desk wall or somewhere on your notice board. I have tried to pin up all small aspects related to collection framework. It can help you to decide which class or data structure you should use in your project and why, to maintain high performance.

This is first version of the chart excluding the practical use of Queue interfaces and its classes. I’ll definitely cover them in next article or in next version of this chart.

Above images are not suitable to reference. So you can download PDF version from below link.

*Above contents are copyrighted. You are free to redistribute the PDF or images but the credit to the author or author’s site must not be removed.

Amit Gupta

Hey! this is Amit Gupta (amty). By profession, I am a Software Eng. And teaching is my passion. Sometimes I am a teacher, as you can see many technical tutorials on my site, sometimes I am a poet, And sometime just a friend of friends...