Java Code Examples for java.io.Console#printf()

protected void displayWarning(boolean persisting) {
  Console c = System.console();
  if (c == null) {
      LOG.unableToPromptForMasterUseKnoxCLI();
      System.err.println("No console.");
      System.exit(1);
  }
  if (persisting) {
    c.printf("***************************************************************************************************\n");
    c.printf("You have indicated that you would like to persist the master secret for this service instance.\n");
    c.printf("Be aware that this is less secure than manually entering the secret on startup.\n");
    c.printf("The persisted file will be encrypted and primarily protected through OS permissions.\n");
    c.printf("***************************************************************************************************\n");
  }
  else {
    c.printf("***************************************************************************************************\n");
    c.printf("Be aware that you will need to enter your master secret for future starts exactly as you do here.\n");
    c.printf("This secret is needed to access protected resources for the service process.\n");
    c.printf("The master secret must be protected, kept secret and not stored in clear text anywhere.\n");
    c.printf("***************************************************************************************************\n");
  }
}
 

public static void main(String[] args) {
    Console console = System.console();

    if (console == null) {
        System.out.print("No console available");
        return;
    }

    String progLanguauge = console.readLine("Enter your favourite programming language: ");
    console.printf(progLanguauge + " is very interesting!");

    char[] pass = console.readPassword("To finish, enter password: ");
    
    if ("BAELDUNG".equals(pass.toString().toUpperCase()))
        console.printf("Good! Regards!");
    else 
        console.printf("Nice try. Regards.");

}
 

private static char[] getSslPassword(CfgAion cfg) {
    CfgSsl sslCfg = cfg.getApi().getRpc().getSsl();
    char[] sslPass = sslCfg.getPass();
    // interactively ask for a password for the ssl file if they did not set on in the config
    // file
    if (sslCfg.getEnabled() && sslPass == null) {
        Console console = System.console();
        // https://docs.oracle.com/javase/10/docs/api/java/io/Console.html
        // if the console does not exist, then either:
        // 1) jvm's underlying platform does not provide console
        // 2) process started in non-interactive mode (background scheduler, redirected output,
        // etc.)
        // don't wan't to compromise security in these scenarios
        if (console == null) {
            System.out.println(
                    "SSL-certificate-use requested with RPC server and no console found. "
                            + "Please set the ssl password in the config file (insecure) to run kernel non-interactively with this option.");
            System.exit(SystemExitCodes.INITIALIZATION_ERROR);
        } else {
            console.printf("---------------------------------------------\n");
            console.printf("----------- INTERACTION REQUIRED ------------\n");
            console.printf("---------------------------------------------\n");
            sslPass =
                    console.readPassword(
                            "Password for SSL keystore file [" + sslCfg.getCert() + "]\n");
        }
    }

    return sslPass;
}
 

private String getCertName(Console console) {
    console.printf("Enter certificate name:\n");
    String certName = console.readLine();
    if ((certName == null) || (certName.isEmpty())) {
        System.out.println("Error: no certificate name entered.");
        System.exit(SystemExitCodes.INITIALIZATION_ERROR);
    }
    return certName;
}
 

public static void main(String[] args) throws IOException {
  // Generates the client ID and client secret from the Google Cloud Console:
  // https://console.cloud.google.com
  String clientId;
  String clientSecret;

  Console console = System.console();
  if (console == null) {
    // The console will be null when running this example in some IDEs. In this case, please
    // set the clientId and clientSecret in the lines below.
    clientId = "INSERT_CLIENT_ID_HERE";
    clientSecret = "INSERT_CLIENT_SECRET_HERE";
    // Ensures that the client ID and client secret are not the "INSERT_..._HERE" values.
    Preconditions.checkArgument(
        !clientId.matches("INSERT_.*_HERE"),
        "Client ID is invalid. Please update the example and try again.");
    Preconditions.checkArgument(
        !clientSecret.matches("INSERT_.*_HERE"),
        "Client secret is invalid. Please update the example and try again.");
  } else {
    console.printf(
        "NOTE: When prompting for the client secret below, echoing will be disabled%n");
    console.printf("      since the client secret is sensitive information.%n");
    console.printf("Enter your client ID:%n");
    clientId = console.readLine();
    console.printf("Enter your client secret:%n");
    clientSecret = String.valueOf(console.readPassword());
  }

  new AuthenticateInStandaloneApplication().runExample(clientId, clientSecret);
}
 

public static void main(String[] args) throws Exception {
  // To fill in the values below, generate a client ID and client secret from the Google Cloud
  // Console (https://console.cloud.google.com) by creating credentials for a Web application.
  // Set the "Authorized redirect URIs" to:
  //   http://localhost/oauth2callback
  String clientId;
  String clientSecret;
  String loginEmailAddressHint;

  Console console = System.console();
  if (console == null) {
    // The console will be null when running this example in some IDEs. In this case, please
    // set the clientId and clientSecret in the lines below.
    clientId = "INSERT_CLIENT_ID_HERE";
    clientSecret = "INSERT_CLIENT_SECRET_HERE";
    // Optional: If your application knows which user is trying to authenticate, you can set this
    // to the user's email address so that the Google Authentication Server will automatically
    // populate the account selection prompt with that address.
    loginEmailAddressHint = null;
    // Ensures that the client ID and client secret are not the "INSERT_..._HERE" values.
    Preconditions.checkArgument(
        !clientId.matches("INSERT_.*_HERE"),
        "Client ID is invalid. Please update the example and try again.");
    Preconditions.checkArgument(
        !clientSecret.matches("INSERT_.*_HERE"),
        "Client secret is invalid. Please update the example and try again.");
  } else {
    console.printf(
        "NOTE: When prompting for the client secret below, echoing will be disabled%n");
    console.printf("      since the client secret is sensitive information.%n");
    console.printf("Enter your client ID:%n");
    clientId = console.readLine();
    console.printf("Enter your client secret:%n");
    clientSecret = String.valueOf(console.readPassword());
    console.printf("(Optional) Enter the login email address hint:%n");
    loginEmailAddressHint = Strings.emptyToNull(console.readLine());
  }

  new AuthenticateInWebApplication().runExample(clientId, clientSecret, loginEmailAddressHint);
}
 

public static void main(String[] args) {
	Console console = System.console();
	if (console != null) {
		String user = new String(console.readLine("Enter User:", new Object[0]));
		String pwd = new String(console.readPassword("Enter Password:", new Object[0]));
		console.printf("User name is:%s", new Object[] { user });
		console.printf("Password is:%s", new Object[] { pwd });
	} else {
		System.out.println("No Console!");
	}
}
 

private static void systemConsoleDemo() {
	Console console = System.console();
	if(console != null){
	Calendar c = new GregorianCalendar();
	console.printf("Welcome %1$s%n", "Pankaj"); //prints "Welcome Pankaj"
	console.printf("Current time is: %1$tm %1$te,%1$tY%n", c); //prints "Current time is: 08 5,2013"
	console.flush();
	}else{
		//No console is attached when run through Eclipse, background process
		System.out.println("No Console attached");
	}
}
 

public void handle(Callback[] callbacks) throws IOException, UnsupportedCallbackException {
    WSPasswordCallback pc = (WSPasswordCallback) callbacks[0];
    Console console = System.console();
    console.printf("Please enter your Rider Auto Parts password: ");
    char[] passwordChars = console.readPassword();
    String passwordString = new String(passwordChars);
    pc.setPassword(passwordString);        
}
 

private void cmdLock() {
	readAndLockRepository();
	Console console = System.console();
	if (console != null) {
		console.printf("Repository locked. Press enter to unlock.\n");
		console.readLine();
		console.printf("Repository unlocked.\n");
	}
}
 

private static String promptForInput() throws Exception {
    Console console = System.console();
    if (console == null) {
        throw new Exception("Couldn't get Console instance");
    }
    console.printf("Press ctrl-d (Unix) or ctrl-z (Windows) to exit\n");
    char passwordArray[] = console.readPassword("Password: ");

    if(passwordArray == null) System.exit(0);

    return new String(passwordArray);
}