java - command works in Windows cmd but fails with Runtime.getRuntime.exec() -


windows 7 cmd has no trouble executing ping -n 5 127.0.0.1 > nul. also, runtime.getruntime.exec(new string[]{"ping", "-n", "5", "127.0.0.1"}) works fine.

but runtime.getruntime.exec(new string[]{"ping", "-n", "5", "127.0.0.1", ">", "nul"}) fails bad parameter >. why?

i'm using java7 in java6 mode.

the > redirection not part of ping command, part of cmd itself. when exec() sees > tries feed ping argument.

to same functionality, read (and ignore) data inputstream process exec return value.


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