Java features applicability

Java language and standard library is powerful, but with great power comes great responsibility. After seeing a lot of user code…

Read More »

Java Coding Conventions considered harmful

There is an official Code Conventions for the Java Programming Language guide published on Oracle site. You would expect this…

Read More »

Testing Quartz Cron expressions

Declaring complex Cron expressions is still giving me some headaches, especially when some more advanced constructs are used. After all,…

Read More »

Where do the stack traces come from?

I believe that reading and understanding stack traces is an essential skill every programmer should posses in order to effectively…

Read More »

RateLimiter – discovering Google Guava

RateLimiter class was recently added to Guava libraries (since 13.0) and it is already among my favourite tools. Have a…

Read More »

Which Java thread consumes my CPU?

What do you do when your Java application consumes 100% of the CPU? Turns out you can easily find the…

Read More »

String memory internals

This article is based on my answer on StackOverflow. I am trying to explain how String class stores the texts,…

Read More »

ServletRequest startAsync() limited usefulness

Some time ago I came across What’s the purpose of AsyncContext.start(…) in Servlet 3.0? question. Quoting the Javadoc of aforementioned…

Read More »

Spring Integration with reCAPTCHA

Sometimes we just need CAPTCHA, that’s a sad fact. Today we will learn how to integrate with reCAPTCHA. Because the…

Read More »