Answer call with Java & Asterisk (more at help.cloudvox.com)

cloudvox-inbound-simple-java.java

public class ExampleCallIn extends BaseAgiScript {
  public void service(AgiRequest request, AgiChannel channel) throws AgiException {
    answer();
    exec("Swift", "Thank you for calling Cloudvox. Enter a 6 digit number.");
    exec("Read", "pin||6|2|10");
    String pin = get_variable("pin");

    exec("Swift", "You entered "); 
    if (pin.length > 0) {
      sayDigits(pin);
    } else {
      streamFile("nothing-at-all");
    }
  }
}