Execute command with prompt YES input

Question

 public static String executeCommand(String command) {
    StringBuffer sb = new StringBuffer();
    Process p;
    try {
      p = Runtime.getRuntime().exec(command);
      p.waitFor();
     }   BufferedReader reader = new BufferedReader(new InputStreamReader(p.getInputStream()));
      String line = "";
      while ((line = reader.readLine()) != null) {
        sb.append(line + "\n");
      }
    } catch (Exception e) {
      e.printStackTrace();
    }
    return sb.toString();
}

given code is working fine to execute any command but I have a command which want YES/NO as input. How I can give the input to command for further execution?

ex.

executeCommand("pio app data-delete model");

output-
[INFO] [App$] Data of the following app (default channel only) will be deleted. Are you sure?
[INFO] [App$]     App Name: twittermodeling
[INFO] [App$]       App ID: 14
[INFO] [App$]  Description: None
Enter 'YES' to proceed:

So How I can give YES to them for further execution.

Thanks

Answer 1

If you really need to pass "YES" to an unix command, you could prefix it by echo YES |. echo YES | pio app data-delete model should force deletion.

In the context of runtime.exec() thought the pipe can't be evaluated correctly, refer to this post for more information.

However, the first thing you should do is check if the pio command does not have a "force" flag, usually -f, which would omit user interactions.