1.update-alternatives工具来添加java可选配置项
sudo update-alternatives –install /usr/bin/javac javac /opt/jdk/jdk1.7.0_71/bin/javac 700
$ sudo update-alternatives –install /usr/bin/jar jar /opt/jdk/jdk1.7.0_71/bin/jar 700
700是优先级数值,我这里随便使用了一个数。
$ sudo update-alternatives –config java