If you have the Java Runtime Environment installed, and the JAR file is executable, it should open with a double-click. Sometimes, you might see a pop-up to choose which app to run the file.

If you have a Web or other computer-based small business, you might find that you need to do some Java programming. Java is a cross-platform programming language from Oracle that anyone can use.

Community driven content discussing all aspects of software development from DevOps to design patterns. Your specific reasons to open a JAR file will determine the right JAR file opener for you to ...

Each installation of the Java Development Kit (JDK) includes a JAR utility (named jar.sh on Unix and jar.exe on Windows) that provides a variety of helpful functions for working with JAR files, ...

(Click to enlarge.) PDF Renderer fills an important niche in the Java developer’s open source toolbox, making it much easier to access and render PDF files using Java libraries. This tool was ...