How do I get the return code in Java after executing a windows command line command

Question

I\'m doing something like this in Java right now

Process p = Runtime.getRuntime().exec(\"ping -n 1 -w 100 127.0.0.1\")

How can I read the w

Answer 1

Use Process.exitValue() method. You will need to handle the exception thrown if the process has not yet exited and retry.

Or, you could use Process.waitFor() to wait for the process to end and it will return the process exit value also (thanks to increment1).

Answer 2

You can use Process#exitValue()

Answer 3

You

waitFor()

it and then get

exitValue()

.

Answer 4

next line of code:

int returnCode = p.waitFor();

This blocks until process is complete. You can also use the Process.exitValue() method, if you don't want to block. See Java6 Process class API doc