Regenerating a JAR file
You can use a JAR file description to regenerate a previously
created JAR file.
Select one or more JAR file descriptions in your workbench.
From the selection's pop-up menu, select Create
JAR. The JAR file(s) are regenerated.
Java development tools (JDT)
Creating a new JAR file
Defining the JAR file's manifest
JAR file exporter