Running shell command from Java, but from Windows Schedule Task?

Question

I have a simple java program that will start a dos based program. The java program works great when I run it, but when I run it from the Windows Task Scheduler, the dox box that should pop up, does not. It is running because I can see it in the task manager but I can not see the command window.
Any ideas how to show the command window from a java application that is ran from Windows Task Scheduler?
Example program below. Runs fine by itself, should get a dos popup that issues the directory command, run it from the scheduler and it does not show the dos box. You can however see it in the Processes as CMD.exe.
import java.io.IOException;
public class Test {
      * @param args
     public static void main(String[] args) {
          try {
               Runtime.getRuntime().exec("cmd /k start dir");
          } catch (IOException e) {
               // TODO Auto-generated catch block
               e.printStackTrace();
}Now the my real program is quite a bit more complicated. It actually goes out and checks the status of an Oracle Database, if all the tablespaces are online, then the middle tier application is allowed to start. The middle tier application is started by my java application, and is comes up with a dos console which shows status and users connected to the database.

Answer 1

Jag,
Actually, the question of whether it works for me seems to depend on the version of the OS (or Oracle). On RedHat Linux (Oracle 8.1.6) it didn't work at all, but on Solaris (Oracle 9.0.2) it did. Here's the output from that run:
SQL> /
output of the command run:
init.ora
initDBPart9i.DBPSun01.ora
initdw.ora
lkDBPART9I
orapw
orapwDBPart9i
spfileDBPart9i.ora
Done
PL/SQL procedure successfully completed.
But, I did need to change a line of your code to this:
Process p = Runtime.getRuntime().exec("/usr/bin/ls");
your original was:
Process p = Runtime.getRuntime().exec("ls");
You might consider, if possible, use of some of the Java File classes instead of ls, as this might make things more predictable for you. There were some examples in oramag.com a few months ago, but they were pretty simple (you might not need them).
Hope this helps,
-Dan
http://www.compuware.com/products/devpartner/db/oracle_debug.htm
Debug PL/SQL and Java in the Oracle Database