How can i install JCE?
Openjdk comes already installed with JCE
A quick test to see if you have the JCE Unlimited Strength Jurisdiction Policy files installed:
$JAVA_HOME/bin/jrunscript -e 'print (javax.crypto.Cipher.getMaxAllowedKeyLength("RC5") >= 256);'
The command should return true if JCE is installed.
You can get them at this PPA
sudo add-apt-repository ppa:webupd8team/java sudo apt update sudo apt install oracle-java7-unlimited-jce-policy
How can you tell if it is installed? This command will succeed :)
For a more upto date Java 8 version run
sudo apt install oracle-java8-installer