I'm currently working on a production server, and I can't get my Java program to be executed on it because of an incompatibility between the versions. Java 7 is installed on the server, while the program was compiled using Java 8.
I found out that the following package was installed : jdk.x86_64
I'm trying to use this tutorial, but it's mentioned that the java-1.7.0-openjdk package should be removed in order to install a new package.
I would like to know the difference between the packages (the one mentioned in the article and the one currently installed) and if it's safe to remove it.