after installing java 8 system said there a problem occured while installing java 8

[Shuvam Ghosh]

shuvam@shuvam-Inspiron-3558:~$ java -version
java version "1.8.0_131"
Java(TM) SE Runtime Environment (build 1.8.0_131-b11)
Java HotSpot(TM) 64-Bit Server VM (build 25.131-b11, mixed mode)
shuvam@shuvam-Inspiron-3558:~$ javac -version
javac 1.8.0_131

it is still showing this

ProblemType: Package
DistroRelease: Ubuntu 16.04
Package: java-common 0.56ubuntu2
ProcVersionSignature: Ubuntu 4.4.0-21.37-generic 4.4.6
Uname: Linux 4.4.0-21-generic x86_64
ApportVersion: 2.20.1-0ubuntu2
Architecture: amd64
Date: Sat Jul 15 14:04:38 2017
Dependencies:

ErrorMessage: package java-common is already installed and configured
InstallationDate: Installed on 2017-07-15 (0 days ago)
InstallationMedia: Ubuntu 16.04 LTS "Xenial Xerus" - Release amd64 (20160420.1)
PackageArchitecture: all
RelatedPackageVersions:
 dpkg 1.18.4ubuntu1
 apt 1.2.10ubuntu1
SourcePackage: dpkg
Title: package java-common 0.56ubuntu2 failed to install/upgrade: package java-common is already installed and configured
UpgradeStatus: No upgrade log present (probably fresh install)