$ sudo apt-get update
$ sudo apt-get install icedtea-7-jre-jamvm 

icedtea-7-jre-jamvm is installed in your system.

Make ensure the icedtea-7-jre-jamvm package were installed using the commands given below,

$ sudo dpkg-query -l | grep icedtea-7-jre-jamvm *

You will get with icedtea-7-jre-jamvm package name, version, architecture and description in a table

icedtea-7-jre-jamvm package basic information: