我通常会拍拍hs in

I normally set paths in

~/.bashrc

但对于Java，我按照
的说明 https://askubuntu.com/questions/55848/how-do-i-install-oracle-java-jdk-7

However for Java, I followed instructions at https://askubuntu.com/questions/55848/how-do-i-install-oracle-java-jdk-7

这对我来说已足够了。

您还可以定义多个java_home并且只有其中一个有效（其余的已注释）。

you can also define multiple java_home's and have only one of them active (rest commented).

假设在你的bashrc文件中，你有

suppose in your bashrc file, you have

export JAVA_HOME = ...... jdk1.7

#export JAVA_HOME = ...... jdk1.8

通知1.8被评论。一旦你做了

notice 1.8 is commented. Once you do

source~ / .bashrc

jdk1.7将在路径中。

jdk1.7 will be in path.

你可以通过这种方式轻松切换它们。还有其他更永久的解决方案。我发布的链接有该信息。

you can switch them fairly easily this way. There are other more permanent solutions too. The link I posted has that info.