PowerShell 安装 Java 失败

[chaopeng]

PS C:\Users\peng> jenv list java
Avaliable java Versions
=====================================
   1.8.0_40
   1.8.0_31
   1.8.0_25
>* 1.8.0_20
   1.8.0_11
   1.8.0_05
   1.8.0
   1.7.0_75
   1.7.0_67
   1.7.0_65
   1.7.0_60
   1.7.0_55
   1.7.0_51
   1.7.0_45
   1.7.0_40
   1.7.0_25
   1.6.0_45
PS C:\Users\peng> jenv current java
c:\jenv\candidates\java\1.8.0_20
PS C:\Users\peng> java -version
java : 无法将“java”项识别为 cmdlet、函数、脚本文件或可运行程序的名称。请检查名称的拼写，如果包括路径，请确保路径正确
，然后再试一次。
所在位置 行:1 字符: 1
+ java -version
+ ~~~~
    + CategoryInfo          : ObjectNotFound: (java:String) [], CommandNotFoundException
    + FullyQualifiedErrorId : CommandNotFoundException

[chaopeng]

Cygwin 安装还是会失败。

➜  ~  jenv install java 1.8.0_20
Installing: java 1.8.0_20
Parsing http://jenv.mvnsearch.org/candidate/java/download/1.8.0_20/Cygwin/x86_64

Found a previously downloaded java 1.8.0_20 archive. Not downloading it again...

Do you want java 1.8.0_20 to be set as default? (Y/n): y
Setting java 1.8.0_20 as default.
Done installing!
➜  ~  java
zsh: exec format error: java