When one-thread-access for synchronized methods is too restrictive, semaphores come to mind.

It's recommended to avoid any asynchrony within the scope of the test. Unfortunately, this is not possible everywhere.

Not everywhere could be immutable objects used to ensure thread-safe code.

Let's build a simple but powerful application package manager with Ant.

This article will show you how to implement an Ant task which consume a sequence of sub-task and call them with a parameter of the result from the execution.

I know, Ant is not the most modern technology, but there are still Ant-based systems we have to maintenance.

In the case of generic beans sometimes you need to get the generic type value for some specific reasons. A typical example could be parsing some data into the type.

Sometimes you have a type of bean in the Spring framework which you want to create by every asking for it - in the scope prototype.

...is very bad practice. Nevertheless, it is not so rare to meet it.