• http://www.oracle.com/technetwork/java/index.html
• http://val.bmstu.ru/unix/java/jre-7u9-windows-i586.exe

# apt install default-jre-headless # need for openfire

# apt install openjdk-8-jre   # need for spark

# add-apt-repository ppa:openjdk-r/ppa  
# apt update   
# apt install openjdk-7-jdk  

# apt install openjdk-7-jre

# pkg install openjdk8-jre