Get exception error running binary file in java

Question

How to get error message when execution binary file with Runtime?

My code is:

Runtime localRuntime = Runtime.getRuntime();
String strExec = "myBinary -s -a myconfigbinary.conf";
try {
    localRuntime.exec(strExec);
    System.out.println("Success execute."); 
} catch (IOException e) {
    System.out.println(e.getMessage().toString());      
}

My code is above, I only get the exception error when the file does not exist. but if I run using the console on the computer when it did not work because of the error in the configuration file or whatever is causing the binary is not running, but I still get message Success execute..

My question is i want to get error message like when i get an error on the console on the computer. How to use the correct exception in this case?

Thanks.

vels4j · Accepted Answer · 2013-01-12 18:38:11Z

1

You can check the error stream like

Process process=localRuntime.exec(strExec);
process.waitFor();
InputStream errorStream = process.getErrorStream();

answered Jan 12, 2013 at 18:38

vels4j

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mtk · Accepted Answer · 2013-01-12 18:39:00Z

1

You should also capture the ErrorStream of the process in java, as

try {
   Process proc = localRuntime.exec(strExec);
   InputStream stderr = proc.getErrorStream();
   InputStreamReader is = new InputStreamReader(stderr);
   BufferedReader br = new BufferedReader(is);
   String line = null;
   while ( (line = br.readLine()) != null)
          System.out.println(line);
   int exitVal = proc.waitFor();
   System.out.println("Process exitValue: " + exitVal);
} catch (Throwable t) {
    t.printStackTrace();
}

If the error from the exec'd process goes to stdout, you might need to do the above for stdout as well.

answered Jan 12, 2013 at 18:39

mtk

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1 Comment

Dave Jackson Over a year ago

get stack and no load view in line proc.waitFor();

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