我希望在我的机器上有不同的Java版本.
我出于这个原因安装了jenv.但是,我无法为其设置所需的Java版本.实际上无法设置任何版本.

我安装了Java 8和11.我想将Java 8设置为全局

这是我试过的片段：

sdos-MacBook-Pro:~ nazar$ls -la /Library/Java/JavaVirtualMachines
total 0
drwxr-xr-x  4 root   wheel  128 Nov 28 16:58 .
drwxr-xr-x  5 root   wheel  160 Nov 19 19:41 ..
drwxr-xr-x  3 root   wheel   96 Nov 19 12:04 jdk1.8.0_192.jdk
drwxr-xr-x@ 3 nazar  staff   96 Oct  6 15:25 openjdk-11.0.1.jdk
sdos-MacBook-Pro:~ nazar$jenv versions
* system (set by /Users/nazar/.jenv/version)
sdos-MacBook-Pro:~ nazar$jenv add /Library/Java/JavaVirtualMachines/jdk1.8.0_192.jdk/Contents/Home/
ln: /Users/nazar/.jenv/versions/oracle64-1.8.0.192: No such file or directory
sdos-MacBook-Pro:~ nazar$ls -lg /Library/Java/JavaVirtualMachines/jdk1.8.0_192.jdk/Contents/Home/
total 52224
-r--r--r--   1 wheel      3244 Oct  6 19:57 COPYRIGHT
-r--r--r--   1 wheel        40 Oct  6 19:57 LICENSE
-r--r--r--   1 wheel       159 Oct  6 19:57 README.html
-rw-r--r--   1 wheel    108062 Sep 12 12:20 THIRDPARTYLICENSEREADME-JAVAFX.txt
-r--r--r--   1 wheel    155003 Oct  6 19:57 THIRDPARTYLICENSEREADME.txt
drwxr-xr-x  46 wheel      1472 Oct  6 20:01 bin
drwxr-xr-x   3 wheel        96 Nov 19 12:04 bundle
drwxr-xr-x   9 wheel       288 Oct  6 19:57 include
-rw-r--r--   1 wheel   5207430 Sep 12 12:20 javafx-src.zip
drwxr-xr-x  10 wheel       320 Oct  6 19:58 jre
drwxr-xr-x  14 wheel       448 Oct  6 19:58 lib
drwxr-xr-x   5 wheel       160 Oct  6 19:57 man
-rw-r--r--   1 wheel       427 Oct  6 19:57 release
-rw-r--r--   1 wheel  21242800 Oct  6 19:57 src.zip
sdos-MacBook-Pro:~ nazar$java -version
openjdk version "11.0.1" 2018-10-16
OpenJDK Runtime Environment 18.9 (build 11.0.1+13)
OpenJDK 64-Bit Server VM 18.9 (build 11.0.1+13, mixed mode)

我无法理解那里错过了什么.
如何用jenv设置Java 8？

解决方法:

我在终端执行：

echo 'export PATH="$HOME/.jenv/bin:$PATH"' >> ~/.bash_profile 
echo 'eval "$(jenv init -)"' >> ~/.bash_profile

之后它可以配置jenv,如手册页中所述.但是,它没有生效：

sdos-MacBook-Pro:~ nazar$jenv versions
  system
  1.8
* 1.8.0.192 (set by /Users/nazar/.jenv/version)
  11.0
  11.0.1
  openjdk64-11.0.1
  oracle64-1.8.0.192
sdos-MacBook-Pro:~ nazar$java -version
openjdk version "11.0.1" 2018-10-16

只有在打开新终端后我才能看到：

sdos-MacBook-Pro:~ nazar$java -version
java version "1.8.0_192"
Java(TM) SE Runtime Environment (build 1.8.0_192-b12)
Java HotSpot(TM) 64-Bit Server VM (build 25.192-b12, mixed mode)