java.io.IOException: Cannot run program "set": CreateProcess error=2, The system cannot find the file specified [duplicate]

Question

I am trying to run set command from eclipse, but i am getting the below exception.

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:

String command = "set Path=C:/Program Files/Java/jdk1.6.0_21/bin";
Process p = Runtime.getRuntime().exec(command);

Perhaps this helps: stackoverflow.com/a/11566302/4065876

Jose Luis
– Jose Luis

2016-04-06 10:08:10 +00:00
Commented Apr 6, 2016 at 10:08 — Jose Luis
– Jose Luis, Commented Apr 6, 2016 at 10:08

Community · Accepted Answer · 2017-05-23 12:01:58Z

10

The program fails because set is not an executable but a command inside the command processor cmd.exe.

To invoke it use

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

edited May 23, 2017 at 12:01

CommunityBot

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answered Apr 6, 2016 at 10:13

wero

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3 Comments

HimaaS Over a year ago

Have doubt that, ping command is working without adding 'cmd' before it.then why only set has this problem, can u please elaborate the reason why should i use 'cmd'?

wero Over a year ago

Windows has a ping.exe and therefore you can start it using Runtime.exec but there is no set.exe (and no echo.exe, dir.exe ...)

HimaaS Over a year ago

Thanks a lot. it is really amazing..

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