Trying to find a way to execute from command prompt using java....

Question

I want to find a way to execute a command from the command line using a java program this is my code:
import java.io.*;
public class SQLHopefully
     public static void main(String[] args)
          try{
          Runtime rt = Runtime.getRuntime();
          Process proc = rt.exec("cmd /k start cmd.exe");
          OutputStream out = proc.getOutputStream();
          System.out.println(out);
          out.write("test.txt".getBytes()); //I THOUGHT THIS WOULD WORK
          InputStream stdin = proc.getErrorStream();
          InputStreamReader isr = new InputStreamReader(stdin);
          BufferedReader br = new BufferedReader(isr);
          String line = null;
          while ( (line = br.readLine()) != null) {
          System.out.println(line);
          stdin = proc.getInputStream();
          isr = new InputStreamReader(stdin);
          br = new BufferedReader(isr);
          line = null;
          while ( (line = br.readLine()) != null) {
          System.out.println(line);
          int exitVal;
          try {
          exitVal = proc.waitFor();
          } catch (InterruptedException e) {
          throw new IOException(e.getMessage());
          if (exitVal != 0) {
          throw new IOException("Exit value was " + exitVal ");
          }catch(IOException e)
          {System.out.println("ummmmm");}
I hope my code is readable. I am trying to get the command prompt that comes up from the Runtime.exec() to run a file called "test.txt" I know it would be easier to just do it by executing it from java but I want to see if it is possible this way. I thought the out.write would do the trick but I was wrong. Somebody help please....
Nate

Answer 1

First read this article:
http://www.javaworld.com/javaworld/jw-12-2000/jw-1229-traps.html
Second, you should probably send the Enter key to the shell if you want anything to happen. (Not that I know whether it will work, but I do know it won't work if you don't press Enter.)