Ubuntu12.10安装jdk7环境配置

sudo update-alternatives --install "/usr/bin/javac" "javac" "/usr/jdk1.7.0_11/bin/javac" 300

sudo update-alternatives --install "/usr/bin/javaws" "javaws" "/usr/jdk1.7.0_11/bin/javaws" 300

sudo update-alternatives --config java

sudo update-alternatives --config javac

sudo update-alternatives --config javaws

9. OK,操作完毕，用java -version查看效果

java version "1.7.0_11"
Java(TM) SE Runtime Environment (build 1.7.0_11-b21)
Java HotSpot(TM) Server VM (build 23.6-b04, mixed mode)

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本文转至http://www.cnblogs.com/dingshuangxi888/archive/2013/01/29/2881975.html，经过本人亲自测试，已安装成功