Take advantage of Docker to ease Java development. Learn how to update a running Java codebase (without restarting the container) and to debug into a remotely running containerized Java app.

What is a JAR file (Java Archive)? A Java Archive, or JAR file, contains all of the various components that make up a self-contained, executable Java application, deployable Java applet or, most ...

Use Java assertions to test your assumptions about program correctness and check them in your code.

Open your Java software development kit and start a new project. Depending upon which software development kit you use, the exact steps will be different. Generally, locate "New" in the File menu.

In fact, you don’t even have to code your Java into a file. JShell can execute lines of Java code directly on the command line. Java without a main method Historically, Java devs have had to code a ...

The second is a change to how OS X handles Java, in which the system will now keep the Java plug-in disabled until it is needed. This will appear for applets if you do not have Java enabled.