:~$ sudo update-alternatives --config mozilla-javaplugin.so
There are 2 choices for the alternative mozilla-javaplugin.so (providing /usr/lib/mozilla/plugins/libjavaplugin.so).

  Selection    Path                                                              Priority   Status
------------------------------------------------------------
* 0            /usr/lib/jvm/java-7-oracle/jre/lib/amd64/libnpjp2.so               1072      auto mode
  1            /usr/lib/jvm/java-7-openjdk-amd64/jre/lib/amd64/IcedTeaPlugin.so   1071      manual mode
  2            /usr/lib/jvm/java-7-oracle/jre/lib/amd64/libnpjp2.so               1072      manual mode

Press enter to keep the current choice[*], or type selection number:
:~$ sudo update-alternatives --config java
There are 2 choices for the alternative java (providing /usr/bin/java).

  Selection    Path                                            Priority   Status
------------------------------------------------------------
* 0            /usr/lib/jvm/java-7-oracle/jre/bin/java          1072      auto mode
  1            /usr/lib/jvm/java-7-openjdk-amd64/jre/bin/java   1071      manual mode
  2            /usr/lib/jvm/java-7-oracle/jre/bin/java          1072      manual mode

Press enter to keep the current choice[*], or type selection number: