Java 9 install in Ubuntu

1. Add the PPA.

sachin@sachin-E470:~$ sudo add-apt-repository ppa:webupd8team/java

2. Refresh system package cache and install the installer scripts via 2 commands one by one:

sachin@sachin-E470:~$ sudo apt-get update

sachin@sachin-E470:~$ sudo apt-get install oracle-java9-installer -Y

3. Once the script successfully installs Java 9 on your system, you may run command to set java 9 environment variables:

sachin@sachin-E470:~$ sudo apt-get install oracle-java9-set-default

4. Check Java Version

sachin@sachin-E470:~$ java --version

java 9.0.1

Java(TM) SE Runtime Environment (build 9.0.1+11)

Java HotSpot(TM) 64-Bit Server VM (build 9.0.1+11, mixed mode)

Its done.