This post introduces you to multi-release JAR files. Discovering multi-release JAR files Many third-party Java frameworks and libraries support several versions of the Java platform.

Here's a quick example of how to use Java's jarsigner to digitially sign JAR files.

Packaging Java web apps as WARs Like JAR, the Web Application ARchive (WAR), the default format for packaging Java web apps, isn't particularly special. When the Servlet and JavaServer Pages ...