pt-get install openjdk-7-jre
Reading package lists... Done
Building dependency tree
Reading state information... Done
You might want to run 'apt-get -f install' to correct these:
The following packages have unmet dependencies:
 openjdk-7-jre : Depends: openjdk-7-jre-headless (= 7u79-2.5.5-0ubuntu0.14.04.2) but it is not going to be installed
                 Depends: libgif4 (>= 4.1.4) but it is not going to be installed
                 Depends: libxtst6 but it is not going to be installed
                 Depends: libgl1-mesa-glx or
                          libgl1
                 Depends: libatk-wrapper-java-jni (>= 0.30.4-0ubuntu2) but it is not going to be installed
                 Recommends: libgnome2-0 but it is not going to be installed
                 Recommends: libgnomevfs2-0 but it is not going to be installed
                 Recommends: libgconf2-4 but it is not going to be installed
                 Recommends: fonts-dejavu-extra but it is not going to be installed
E: Unmet dependencies. Try 'apt-get -f install' with no packages (or specify a solution).