As a Java EE developer, I sometimes envy how fast it’s possible to see the result of a code change in a running application with interpreted languages like PHP or JavaScript. With Java, it’s always necessary to rebuild the source code in a bytecode, which can be then safely updated only by restarting the whole application. And all developers know that restoring the desired state of the application after a fresh restart takes time and is tedious. A while ago I’ve come across an opensource tool called HotswapAgent that speeds up code reloading. (more…)

Ever wondered why Eclipse/Netbeans keeps pausing for a while every now an then? Especially right at the time when you want to show something in the code to your dear colleages? It feelt embarrassing and awkward, didn’t it?

I found out that most of the time the IDE pauses because of Garbage Collector execution. The subtle little element in design of JVM, which usually does great job in relieving us developers from worrying about memory consumption, and most people are just happy that it does its job well and ignore it most of the time. However, the consequences of running Garbage Collector may surprise us if we simply ignore it. (more…)

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