Java find out if Batch file ran successfully

Question

I'm running a Batch file from Java like so:

Runtime
    .getRuntime()
    .exec("cmd /c " + filepath);

Is there any way to find out if the Batch file ran successfully or failed from within Java?

Is this a duplicate of stackoverflow.com/questions/1410741/… — newbie
– newbie, Commented Sep 3, 2020 at 12:23
That very much depends on your definition of "success". you can of course check the RETURN CODE coming back when executing a command. But is that "enough" ... we dont know, as you didnt specify that part. — GhostCat
– GhostCat, Commented Sep 3, 2020 at 12:24
exec returns a Process, which has an .exitValue and a .getOutputStream methods you can use to check the exit value and output of the command you executed — Aaron
– Aaron, Commented Sep 3, 2020 at 12:25

Cardinal System · Accepted Answer · 2020-09-03 15:44:11Z

2

Use the Process instance that Runtime#exec(String) constructs:

Process p = Runtime.getRuntime().exec("cmd /c " + filepath);

You can call Process#waitFor which "causes the current thread to wait, if necessary, until the process represented by this Process object has terminated." Afterwords, see if it completed successfully with Process#exitValue.

You can also interact with the process by fetching its input and output streams:

InputStream inputStream = p.getInputStream(), errorStream = p.getErrorStream();
OutputStream outputStream = p.getOutputStream();

edited Sep 3, 2020 at 15:44

answered Sep 3, 2020 at 12:28

Cardinal System

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