I decided to update my JDK7 to recent version from here. Corresponding x64 tag.gz archive for my architecture has been downloaded and extracted to /usr/lib/jvm as usual. All previous versions of Java ...
I want to have two JDKs. The first one was installed a long time ago to /usr/lib/jvm/java-7-oracle/. I installed the second version and executed following commands to add it to alternatives: ...