Dear Gaurav,
Hope you are doing well.
Please follow below steps
1. Download Oracle Java from below link
2. Extract the tar ball
tar -xvf jdk-7u79-linux-x64.tar.gz
3. Make directory java under /usr/lib and move extracted package into java directory
mkdir /usr/lib/java
sudo mv jdk-7u-.... /usr/lib/java
4. Open and edit .bashrc file and give the Java installation path
sudo gedit .bashrc
5. Now set Java Home variable
Please try the same and let me know if the issue persist.