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.

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.

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, ...

Java Network Launching Protocol ... Click the down arrow next to the JNLP file and click "Always open files of this type." Protect your computer and your office network from malware by making ...

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 ...