Execute DOS command inside java

Question

I have a java program that reads each new user from an inputfile and writes that same user to an output file. The program works fine and is shown below:
import java.io.*;
public class FileStreamsTest {
public static void main(String[] args) {
try {
File inputFile = new File("newbousrs.txt");
File outputFile = new File("outagain.txt");
FileInputStream fis = new FileInputStream(inputFile);
FileOutputStream fos = new FileOutputStream(outputFile);
int c;
while ((c = fis.read()) != -1) {
fos.write(c);
fis.close();
fos.close();
} catch (FileNotFoundException e) {
System.err.println("FileStreamsTest: " + e);
} catch (IOException e) {
System.err.println("FileStreamsTest: " + e);
What I would like to do after each write is to execute a DOS command that looks something like this: supervsr.exe -USER username -PASS password -IMPORTUSERS importfile.txt
The DOS command above will add each user to the system I want to as the loop goes through each user record.
How do I execute the DOS command above inside java?

Answer 1

Tried what but still having a problem...here is my code:
import java.io.*;
public class ReadSource {
public static void main(String[] arguments) {
try {
FileReader file = new FileReader("newbousrs.txt");
                              //FileWriter letters = new FileWriter("outagain.txt");
                              //PrintWriter pw = new PrintWriter(new FileWriter("outagain.txt"));
BufferedReader buff = new BufferedReader(file);
                              Runtime rt = Runtime.getRuntime();
boolean eof = false;
while (!eof) {
String line = buff.readLine();
if (line == null)
eof = true;
else
System.out.println(line);
                                             Process proc = rt.exec("\\Blowfish\\droot\\Program Files\\Business Objects\\BusinessObjects 5.0\\supervsr.exe -USER xxxxx -PASS yyyy -IMPORTUSERS \\Blowfish\\droot\\accsp\\public\\newusers\\newbousrs.txt");
                                             //System.out.println(line.substring(4, 10));
                                             //System.out.println(line.substring(3,line.indexOf(',',3)));
buff.close();
} catch (IOException e) {
System.out.println("Error -- " + e.toString());
There error I get is this:
C:\jakarta-tomcat-4.0.3\webapps\webdav\WEB-INF\classes\accsp>java ReadSource
NU,Public,Steve Mcnealy,Steve Mcnealy,U,N,N,Y,N,N,PC,F,Y,N,N
Error -- java.io.IOException: CreateProcess: \Blowfish\droot\Program Files\Busin
ess Objects\BusinessObjects 5.0\supervsr.exe -USER accsp -PASS fish -IMPORTUSERS
\Blowfish\droot\accsp\public\newusers\newbousrs.txt error=3