3] Run a Java or JAR file. Now when you double click on the JAR file, it will automatically run like how EXE files execute. If there is a problem with version, the file should inform you.

The file should download and show up in your download bar at the bottom of the screen. Click the down arrow next to the JNLP file and click "Always open files of this type." Advertisement ...

View the contents of the open JAR file on the file system; Is a JAR file just a ZIP file? A Java JAR file is really just a ZIP file. Java applications can be made up of hundreds or even thousands of ...

Open source licenses. Each of the Java projects covered in this series is subject to an open source license, ... you must download the ZIP file, ...

Extract the contents of the Java 21 JDK zip file. The download is just a zip file, so you can extract the contents anywhere onto your local file system. The extraction contains a folder named java-21.