Hi,

Here are the steps to remove oracle JDK 8 from Ubuntu 16.04.

Check the JDK package to be removed

sudo dpkg --list | grep -i jdk

Remove Oracle Java 8

sudo apt-get purge oracle-java8-installer

or

sudo apt-get remove oracle-java8-installer

Check again the JDK packages

sudo dpkg --list | grep -i jdk

Now you have completely removed JDK from your Ubuntu os.

Thanks

Hi,

Here is the complete log of the process:

root@deepak-VirtualBox:/home/deepak# sudo dpkg --list | grep -i jdk
ii  oracle-java8-installer                      8u101+8u101arm-1~webupd8~2                                  all          Oracle Java(TM) Development Kit (JDK) 8
root@deepak-VirtualBox:/home/deepak# sudo apt-get purge oracle-java8-installer
Reading package lists... Done
Building dependency tree        
Reading state information... Done
The following packages will be REMOVED:
  oracle-java8-installer*
0 upgraded, 0 newly installed, 1 to remove and 0 not upgraded.
After this operation, 93.2 kB disk space will be freed.
Do you want to continue? [Y/n] y
(Reading database ... 175193 files and directories currently installed.)
Removing oracle-java8-installer (8u101+8u101arm-1~webupd8~2) ...
Purging configuration files for oracle-java8-installer (8u101+8u101arm-1~webupd8~2) ...
Processing triggers for shared-mime-info (1.5-2ubuntu0.1) ...
Processing triggers for gnome-menus (3.13.3-6ubuntu3.1) ...
Processing triggers for desktop-file-utils (0.22-1ubuntu5) ...
Processing triggers for bamfdaemon (0.5.3~bzr0+16.04.20160701-0ubuntu1) ...
Rebuilding /usr/share/applications/bamf-2.index...
Processing triggers for mime-support (3.59ubuntu1) ...
root@deepak-VirtualBox:/home/deepak# java
The program 'java' can be found in the following packages:
 * default-jre
 * gcj-5-jre-headless
 * openjdk-8-jre-headless
 * gcj-4.8-jre-headless
 * gcj-4.9-jre-headless
 * openjdk-9-jre-headless
Try: apt install <selected package>
root@deepak-VirtualBox:/home/deepak# sudo dpkg --list | grep -i jdk
root@deepak-VirtualBox:/home/deepak#

Thanks

Check following video:

Thanks