How to read executables stdout stderr from Java code?

Question

AFAIK, one can run a command line executable from Java using Runtime. And even get error code with processes WaitFor(). But how can I read executables output? Both stdout and stderr?

Chintan Rathod · Accepted Answer · 2013-06-04 10:30:36Z

1

Runtime tr = Runtime.getRuntime();

try {
    Process p = tr.exec("c:\\a.bat");
    InputStream err = p.getErrorStream();
    InputStream std = p.getInputStream();
    //TODO here we go!
} catch (IOException e) {
    e.printStackTrace();
}

edited Jun 4, 2013 at 10:30

Chintan Rathod

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answered Jun 4, 2013 at 10:10

BrookLeet

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1 Comment

Jim Garrison Over a year ago

This does not work. The correct solution uses at least one more thread, two is better, to handle the asynchronous nature of co-processes.

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