Asma rabe <asma.rabe at gmail.com> writes: > If i should install both java 1.6 and 1.7 , how to do that ? I don't know whether you *should* do it, not knowing much about your setup, but assuming CentOS 7, I think you can install both the java-1.6.0-openjdk and java-1.7.0-openjdk packages.