问题描述
Java 9安装在我的MacBook(OS X 10.11 El Capitan)中。因为我需要Java 8,所以我使用Homebrew安装它。
Java 9 is installed in my MacBook (OS X 10.11 El Capitan). As I needed Java 8, I've installed it using Homebrew.
$ brew cask install java8
但是,终端中的Java版本仍为9。
However, the Java version is still 9 in the terminal.
$ java -version
java version "9"
Java(TM) SE Runtime Environment (build 9+181)
Java HotSpot(TM) 64-Bit Server VM (build 9+181, mixed mode)
当前Java的安装位置似乎是在 /系统/库/框架/.../命令
The install location of the current Java seems to be in /System/Library/Frameworks/.../Commands
$ ls -la /usr/bin/java
lrwxr-xr-x 1 root wheel 74 Sep 23 2017 /usr/bin/java -> /System/Library/Frameworks/JavaVM.framework/Versions/Current/Commands/java
自制似乎已经在
Homebrew seems to have installed Java 8 in
/Library/Java/JavaVirtualMachines/jdk1.8.0_162.jdk/Contents/Home/bin/
当然我可以将上述路径添加到 PATH
〜/ .profile
中的环境变量,但我想知道是否有更健壮的方法来设置旧Java版本的路径。
Of course I could just prepend the above path to the PATH
environment variable in ~/.profile
, but I wanted to know whether there is a more robust way of setting the path for the older Java version.
推荐答案
我使用。
我将以下内容添加到我的bash配置文件中(文件我的主目录中的 .bash_profile
。
I added the following to my bash profile (the file .bash_profile
in my home directory).
alias j9="export JAVA_HOME=`/usr/libexec/java_home -v 9`; java -version"
alias j8="export JAVA_HOME=`/usr/libexec/java_home -v 1.8`; java -version"
alias j7="export JAVA_HOME=`/usr/libexec/java_home -v 1.7`; java -version"
当我想要更改为Java版本时,我只需执行 j7
在终端中。
When I want to change to a Java version, I simply execute j7
in the terminal.
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