javac无法在Windows命令提示符下工作 [英] javac not working in windows command prompt

问题描述

我正在尝试使用Windows命令提示符 javac ，但它无效。

I'm trying to use javac with the windows command prompt, but it's not working.

之后将目录C：\Program Files \Java \jdk1.6.0_16 \ bin \添加到 PATH的末尾环境变量， java 命令工作正常，但使用 javac 给出了以下错误：

After adding the directory "C:\Program Files\Java\jdk1.6.0_16\bin\" to the end of the PATH environment variable, the java command works fine, but using javac gives me the following error:

'javac'未被识别为内部或外部命令，可运行程序或批处理文件。

'javac' is not recognized as an internal or external command, operable program or batch file.

推荐答案

如果在命令提示符打开时将其添加到控制面板中，则不会影响当前的命令提示符。您需要退出并重新打开或只是执行：

If you added it in the control panel while your command prompt was open, that won't affect your current command prompt. You'll need to exit and re-open or simply do:

set "path=%path%;c:\program files\java\jdk1.6.0_16\bin"

通过检查，执行：

echo %path%

从命令提示符处告诉我们它是什么。

from your command prompt and let us know what it is.

否则，请确保 是一个javac在该目录中尝试：

Otherwise, make sure there is a javac in that directory by trying:

"c:\program files\java\jdk1.6.0_16\bin\javac.exe"

从命令提示符处。您还可以通过命令告诉使用哪个可执行文件（如果有）：

from the command prompt. You can also tell which executable (if any) is being used with the command:

for %i in (javac.exe) do @echo %~$PATH:i

这是一个巧妙的把戏类似于某些UNIX类型操作系统中的 和/或 whence 命令。

This is a neat trick similar to the which and/or whence commands in some UNIX-type operating systems.

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