Ubuntu12.04のJavaをアップデート

さくらVPSのUbuntu12.04のJavaを更新したので作業メモ。

% add-apt-repository ppa:webupd8team/java
% aptitude update
% aptitude install oracle-java7-installer
% aptitude install oracle-java8-installer

変更する。

% update-alternatives --config java
There are 3 choices for the alternative java (providing /usr/bin/java).

  Selection    Path                                     Priority   Status
------------------------------------------------------------
* 0            /usr/lib/jvm/java-8-oracle/jre/bin/java   65        auto mode
  1            /usr/lib/jvm/java-6-sun/jre/bin/java      63        manual mode
  2            /usr/lib/jvm/java-7-oracle/jre/bin/java   64        manual mode
  3            /usr/lib/jvm/java-8-oracle/jre/bin/java   65        manual mode

ん？Java8に自動的になってる？

% java -version
java version "1.8.0_05"
Java(TM) SE Runtime Environment (build 1.8.0_05-b13)
Java HotSpot(TM) 64-Bit Server VM (build 25.5-b02, mixed mode)

なってた