Running a batch file in a java servlets programme

this is what i have
Process p = Runtime.getRuntime().exec("C:\\sync.bat");
Now i need a way for the program to wait until this is finished running. I dont want to print anything until this is done. Is there a way to do this

Will this even run sync.bat or do i have to do more.Here is my entire code
import java.io.*;
import java.io.File;
import javax.servlet.*;
import javax.servlet.http.*;
import javax.swing.*;
public class index_test extends HttpServlet
     public void doGet(HttpServletRequest req, HttpServletResponse res) throws ServletException, IOException
          res.setContentType("text/html");
          PrintWriter out = res.getWriter();
          out.println("<HTML>");
          out.println("<body>");
          try
               Process p = Runtime.getRuntime().exec("C:\\sync.bat");
               String dir = "C:\\Perforce";
               File what = new File(dir);
               String [] listy = new String [100];
               String [] products = new String[5];
               String lists;
               listy = what.list();
               out.println("<form action =getBuilds Method = get>");
               out.println("Please select which Product you wish to search in: ");
               out.println("<br>");
               int j = 0;
               if(listy[j] != null)
                    products[j] = listy[j];
                    j++;
               int i =0;
               for(i = 0; i<listy.length && listy[i] !=null;i++)
                    out.println("<input type ='radio' name = 'product' value='"+dir+"\\"+products[i]+"\\build'>");
                    out.println(products);
                    out.println("<br>");
               out.println("<input type ='submit' value ='Submit'>");
               out.println("<br>");
          catch(IOException e){}
          out.println("<img src='C:\\tomcat4\\webapps\\Tracker\\dancing2.gif'>");
          out.println("</form></body></html>");
What i need is to run sync.bat, wait till its finished then print out the folders in the Perforce directory. I can print out the contents of Perforce grand i just dont know how to run the batch file and get the progeam to wwait until its finished

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CODE 1
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Hi guys,
I want to run a batch file by running a java program.
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You will need this:
http://www.javaworld.com/javaworld/jw-12-2000/jw-1229-traps.html

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Author: pkanury
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Hi people
I am attempting to run a batch file from with a JSP page.
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1) It is O.K. that you see nothing in that console. Its output is captured by Java and is not displayed on the screen.
In general, that console should not be visible, but actually it behaves differently according to JDK and OS versions (treat that as a feature).
2). Look at this article:
http://www.javaworld.com/javaworld/jw-12-2000/jw-1229-traps.html
It it does not answer your problem, try to search the forums:
http://search.java.sun.com/search/java/index.jsp?qp=%2Bforum%3A31&nh=10&qt=%2B%22exec%22+-%22Replies%3A+0%22&col=javaforums
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Edited by: user1067632 on 31.05.2010 05:16

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