The challenge Complete the solution so that it splits the string into pairs of two characters. If the string contains an odd number of characters then it should replace the missing second character of the final pair with an underscore (‘_’). Examples: Tes... (more…)

Many developers were burned by the overly complex world of Java back in the early 2000s. The Gang of Four patterns and middleware / J2EE / Java EE led to ridiculous levels of alleged decoupling as is evident in this sequence diagram from an open source J... (more…)

Programming book reviews, programming tutorials,programming news, C#, Ruby, Python,C, C++, PHP, Visual Basic, Computer book reviews, computer history, programming history, joomla, theory, spreadsheets and more. (more…)

Good application developers use existing libraries rather than reinventing every wheel. This is particularly true on the JVM, where there are a huge number of wheels to choose from. So in addition to writing good code, developers need be able to ass... (more…)

Professional Java Performance Profiling In Practice...