apt-get update && apt-get install -y wget
wget https://download.java.net/java/GA/jdk9/9.0.4/binaries/openjdk-9.0.4_linux-x64_bin.tar.gz -O jdk.tar.gz
tar -xzf jdk.tar.gz -C /opt/
mv /opt/jdk-9.0.4 /opt/jdk