How to Run External Exe/Scripts

Question

Hi,
I am new to Java. I am doing a GUI Application Using Swing. I want to execute list of external exe or perl script repeatedly from my Application. I Tried that one using in for loop. within the for loop i write execute my external exe or script. I got the expected result. but my problem is I can not interact with the application on the of loop execution. Any one can Give me a Solution?.
Here is my Try..
Runtime rt = Runtime.getRuntime();
Process pr ;
String ScriptPath
for (int rcount = 0; rcount < trows ;rcount++ ){
     ScriptPath = "D:/Scrip" + rcount + ".pl";
     try{
          pr = rt.exec(ScriptPath);
          exitVal = pr.waitFor();
     catch (Exception e){
          exitVal = 4;
     JOptionPane.showMessageDialog(null, "Status: " + exitVal, "Status" , JOptionPane.ERROR_MESSAGE);
Thanks,
Rajesh.K

Answer 1

You are probably executing you external apps via the Event Dispatch Thread. This is the thread responsible for updating the GUI.
You need to read up on the SwingWorker class. This is exactly where it should be used.
http://java.sun.com/docs/books/tutorial/uiswing/misc/threads.html
nes