Calling runtime.exec in menu(swing)

Question

Hi all,
I want to pop up a command (NT) window from a menu in java swing.
1. However I am able to call from the menu, but was Not able to get the batch file (either .bat or .exe) to run in another window
2. and all the output from the batch file did not printout to screen.
any help?
JMenuItem menuItem = null;
startAction = new AbstractAction("Start") {
public void actionPerformed(ActionEvent e) {
displayResult("Starting Application...", e);
Process JobProcess = null;
try {
// JobProcess = Runtime.getRuntime().exec("cmd.exe /c test.bat");
//JobProcess = Runtime.getRuntime().exec("cmd /K start cmd /K test.bat");
//JobProcess = Runtime.getRuntime().exec("cmd.exe /c test.bat"); //works
JobProcess = Runtime.getRuntime().exec("test.bat"); // works
JobProcess.waitFor();
int i = JobProcess.exitValue();
catch (Exception ex) {
textArea.append(ex.getMessage());
in the test.bat :
echo "this is test" > test.txt
thanks
andrew

Answer 1

I don't believe you can ues redirection (>) when executing a command. Your program must handle the output itself. Add code something like:
String line;
BufferedReader output = new BufferedReader( new InputStreamReader( JobProcess.getInputStream() ) );
while ( (line = output.readLine()) != null )
          System.out.println( line );
output.close();Note: the variable JobProcess should be renamed to jobProcess. The Java convention is to use uppercase for class names.