Trouble installing Scala in Debian Jessie

Question

I want to install Apache Spark in Debian Jessie.

I have correctly installed Oracle Java 7, and followed the steps for the installation of Scala:

sudo mkdir /usr/local/src/scala
sudo tar -xvf scala-2.11.7.tgz -C /usr/local/src/scala/
nano .bashrc
export SCALA_HOME=/usr/local/src/scala/scala-2.11.7
export PATH=$SCALA_HOME/bin:$PATH

Despite the fact that I have checked each step several times, the following output is given when I check if Scala is correctly Installed (scala -version):

   diego@DESKTOP-M93VP0O:~$ scala -version
cat: (/usr/lib/jvm/java-7-oracle/)/release: No such file or directory
Exception in thread "main" java.lang.UnsupportedClassVersionError: scala/tools/nsc/MainGenericRunner : Unsupported major.minor version 52.0
    at java.lang.ClassLoader.findBootstrapClass(Native Method)
    at java.lang.ClassLoader.findBootstrapClassOrNull(ClassLoader.java:1070)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:414)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:412)
    at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:308)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:358)
    at sun.launcher.LauncherHelper.checkAndLoadMain(LauncherHelper.java:482)

I am a newbie in linux. I would like to know how I may fix the problem (I have followed the steps of the following video https://www.youtube.com/watch?v=eQ0nPdfVfc0).

Can you install Java 8? [That is likely to fix your immediate problem](http://stackoverflow.com/a/35866015/1072626) (possible duplicate). I suspect there is more going on because Scala 2.11 should be compatible with Java 7, so I wonder if the Scala you are trying to run is not the 2.11.7 you think. — vossad01, Jan 13 '17 at 21:54

Trouble installing Scala in Debian Jessie

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