Community driven content discussing all aspects of software development from DevOps to design patterns. It’s much easier to format an int with printf than a float or double, because decimal precision ...

There are very good reasons for Java’s long-lived popularity as a server-side platform. It combines unbeatable maturity and breadth with a long and ongoing history of innovation. Using Spring adds a ...

When calling the toList() method of a JSONArray which contains JSONObject the returned list contains HashMap elements. The documentation mentions: Returns a java.util.List containing all of the ...

I frequently get lag spikes and the thread lock shows this: java.util.ArrayList.indexOf(ArrayList.java:317) java.util.ArrayList.contains(ArrayList.java:300) java.util ...

One of the nasty little traps a Java developer can run into occurs when Collection.contains(Object) is not used with appropriate understanding. I demonstrate this ...