How to close dos 'pause' command in Java

[pkinuk Buler]

Hi all,

I need to write a program to execute two xxx.cmd files. Because the last line in both of the command files have a 'pause' command (Please press any key to continue...). My task is run the program to execute them one by one. Because I can't modify the contents in both command files. Therefore I wrote a small program to run a command file.

  
@echo this is test!
@pause
@echo finish!

Let's call the command file to be test.cmd.

My problem is the program seems to be deadlock after reading the first line message "this is test!". My question is what should I do to skip the 'pause' command so that I can get the "finish!" message without changing the content of the test.cmd file.

Thank you in advance!

The following is the Java code I used to execute the test.cmd file.

  
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;

class StreamGobbler extends Thread {
	InputStream is;
	String type;

	StreamGobbler(InputStream is, String type) {
		this.is = is;
		this.type = type;
	}

	public void run() {
		try {
			InputStreamReader isr = new InputStreamReader(is);
			BufferedReader br = new BufferedReader(isr);
			String line = null;
			while ((line = br.readLine()) != null) {
				System.out.println(type + ">" + line);
			}

		} catch (IOException ioe) {
			ioe.printStackTrace();
		}
	}
}

public class GoodWindowsExec {

	public static void main(String args[]) {

		if (args.length < 1) {
			System.out.println("USAGE: java GoodWindowsExec <cmd>");
			System.exit(1);
		}

		try {
			String osName = System.getProperty("os.name");
			String[] cmd = new String[3];
			if (osName.equals("Windows NT")) {
				cmd[0] = "cmd.exe";
				cmd[1] = "/C";
				cmd[2] = args[0];
			} else if (osName.equals("Windows 7")) {
				cmd[0] = "cmd.exe";
				cmd[1] = "/C";
				cmd[2] = args[0];
			}

			Runtime rt = Runtime.getRuntime();
			System.out.println("Execing " + cmd[0] + " " + cmd[1] + " "
					+ cmd[2]);
			Process proc = rt.exec(cmd);
			// any error message?
			StreamGobbler errorGobbler = new StreamGobbler(proc
					.getErrorStream(), "ERROR");

			// any output?
			StreamGobbler outputGobbler = new StreamGobbler(proc
					.getInputStream(), "OUTPUT");

			// kick them off
			// errorGobbler.start();
			outputGobbler.start();

			// any error???
			int exitVal = proc.waitFor();
			System.out.println("ExitValue: " + exitVal);
		} catch (Throwable t) {
			t.printStackTrace();
		}
	}
}

[James Sabre]

Untested - write a new line character to the Process stdin obtained from Process.getOutputStream(). You can perform the write just before the proc.waitFor(). You should then close() stdin.

[pkinuk Buler]

Thank you James Sabre! It worked

[James Sabre]

pkinuk Buler wrote:Thank you James Sabre! It worked

I have just noticed that you don't seem to start the error gobbler.