Get a deep dive into using method references in your Java programs, including stream operations, event listeners, and constructors and factories.

The example code below shows how to use Java’s DirectoryStream in a method to list the files of a directory: public Set<String> listFilesUsingDirectoryStream(String dir) throws IOException { ...

Java interfaces are different from classes, and it’s important to know how to use their special properties in your Java programs. This tutorial introduces the difference between classes and ...

String manipulation is always resource-intensive, but compiled regex in Python and Java can help keep performance issues at bay.