# java
Java ARchive
- File format based on popular ZIP format
- the only archive format that is cross-platform
- the only format that handles audio and image files as well as class files
- backward-compatible with existing applet code
- an open standard, fully extendable, and written in java
- the preferred way to bundle the pieces of a java applet
# Create jar files from source
jar cf myJar.jar myClass.class
sudo update-alternatives --config java
https://askubuntu.com/questions/430434/replace-openjdk-with-oracle-jdk-on-ubuntu