无法从Windows PowerShell命令提示符运行Java [英] Cannot run Java from the Windows PowerShell command prompt

问题描述

我的机器上安装了Java（JRE在 C：\Program Files \ Java 下），但我无法从Windows运行任何java命令PowerShell命令提示符。

I have Java installed on my machine (the JRE is under C:\Program Files\Java) but I can't run any java command from the Windows PowerShell command prompt.

>>> java -version
java : The term 'java' is not recognized as the name of a cmdlet, function, script file, or operable program. Check
the spelling of the name, or if a path was included, verify that the path is correct and try again.
At line:1 char:1
+ java
+ ~~~~
    + CategoryInfo          : ObjectNotFound: (java:String) [], CommandNotFoundException
    + FullyQualifiedErrorId : CommandNotFoundException

但是，我注意到Java确实有效，我可以在旧的Windows命令提示符下运行Java命令。原来它只是PowerShell，我无法运行这些命令。

However, I have noticed that Java does work and that I can run Java commands on the old Windows command prompt. Turns out it's only PowerShell where I can't run those commands.

我有JRE 7，我在Windows 8上使用Windows PowerShell。

I have JRE 7 and I'm using Windows PowerShell on Windows 8.

推荐答案

• 在运行对话框中，输入 sysdm.cpl


• 在出现的窗口，导航到高级选项卡。单击 Environment Variables 按钮。



• 将java安装的位置（bin目录）添加到 PATH 变量。

  • In the run dialog box, enter sysdm.cpl
  • In the window that came up, navigate to Advanced tab. Click on the Environment Variables button.

  • Add the location of your java installation (the bin directory) to the PATH variable.

    ;%ProgramFiles%/Java/jre%version%/bin
    

    后跟;

    注意：

    %version% means the java version.
    

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