those classes and interfaces. Examples of Java’s packages include: Only one package directive can appear in a source file. Furthermore, the package directive must be the first code (apart from ...

In this functional programming tutorial, we will work through a Java Supplier interface example. Java’s functional supplier interface can be used any time a function needs to generate a result without ...

In this Java file upload example, the target server is Tomcat 9, although the latest JBoss, Jetty, WebSphere or OpenLiberty servers will also work. When the application runs, a file selector will ...

This post introduces you to multi-release JAR files. Many third-party Java frameworks and libraries support several versions of the Java platform. For example, as of version 4.0, the Spring ...