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July 2001



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Standard Input / Output and Error of the 'executed' program

Posted by Salil V Gangal on July 08, 2001 at 12:13 PM


On Windows platform I'm wondering about what happens to the Standard Input / Output and Error of a program that I'm executing from within my Java program by using the Runtime ?

Say there is some code such as ===>

public static void runAnExeFile ( String exeFileName )
Process p = null;
int status;
try {
Runtime r = Runtime.getRuntime();
p = r.exec(exeFileName);

catch (IOException e) {
System.err.println("Caught IOException: " + e.getMessage());

try {
status = p.waitFor();
catch (InterruptedException e) {
status = -1;
if ( status == -1 ) {
System.err.println("Process is interrupted. Exiting ...");

So the question is what happens to the standard Input / Output and Error of the 'exeFileName' which is getting executed by the statements hilited in the above code ?

Salil V Gangal


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