java.io.IOException：无法运行程序“set”：CreateProcess error=2，系统找不到指定的文件
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java.io.IOException: Cannot run program "set": CreateProcess error=2, The system cannot find the file specified
提问by HimaaS
I am trying to run set command from eclipse, but i am getting the below exception.
我正在尝试从 Eclipse 运行 set 命令，但出现以下异常。
java.io.IOException: Cannot run program "set": CreateProcess error=2, The system cannot find the file specified
at java.lang.ProcessBuilder.start(ProcessBuilder.java:1048)
at java.lang.Runtime.exec(Runtime.java:620)
at java.lang.Runtime.exec(Runtime.java:450)
at java.lang.Runtime.exec(Runtime.java:347)
Here is my piece of code:
这是我的一段代码：
String command = "set Path=C:/Program Files/Java/jdk1.6.0_21/bin";
Process p = Runtime.getRuntime().exec(command);
回答by wero
The program fails because setis not an executable but a command inside the command processor cmd.exe.
程序失败，因为set它不是可执行文件，而是命令处理器内的命令cmd.exe。
To invoke it use
调用它使用
String command = "cmd.exe /c set path=C:/Program Files/Java/jdk1.6.0_21/bin";
Process p = Runtime.getRuntime().exec(command);
But be aware of the pitfalls of setting environment variables, see How to set an environment variable in Java using exec?as mentionend in the comments by @Berger
但请注意设置环境变量的陷阱，请参阅如何使用 exec 在 Java 中设置环境变量？正如@Berger 在评论中提到的那样
