javakommando som kommunicerar med windows Cmd.

try {
    Process p = Runtime.getRuntime().exec("notepad .\\doc\\help.txt");
}
catch(Exception e) {
    System.out.println("Unable to open file '.\\doc\\help.txt' with 'notepad'.");
}

import java.io.*;

class Ping {
	
	public static void main(String[] args) {
		try{
			Runtime r = Runtime.getRuntime();
			Process p = r.exec("ping localhost");
			
			BufferedReader in = new BufferedReader(new InputStreamReader(p.getInputStream()));
			
			String line;
			while ((line = in.readLine()) != null) {
				System.out.println(line);
			}
			in.close();
			
		}
		catch(Exception e) {
			System.out.println("uups.." + e.toString());
		}	
	}
}