Examples of java.io.Console$LineReader

java.io.Console
Methods to access the character-based console device, if any, associated with the current Java virtual machine.
Whether a virtual machine has a console is dependent upon the underlying platform and also upon the manner in which the virtual machine is invoked. If the virtual machine is started from an interactive command line without redirecting the standard input and output streams then its console will exist and will typically be connected to the keyboard and display from which the virtual machine was launched. If the virtual machine is started automatically, for example by a background job scheduler, then it will typically not have a console.
If this virtual machine has a console then it is represented by a unique instance of this class which can be obtained by invoking the {@link java.lang.System#console()} method. If no console device isavailable then an invocation of that method will return null.
Read and write operations are synchronized to guarantee the atomic completion of critical operations; therefore invoking methods {@link #readLine()}, {@link #readPassword()}, {@link #format format()}, {@link #printf printf()} as well as the read, format and write operationson the objects returned by {@link #reader()} and {@link #writer()} mayblock in multithreaded scenarios.
Invoking close() on the objects returned by the {@link #reader()}and the {@link #writer()} will not close the underlying stream of thoseobjects.
The console-read methods return null when the end of the console input stream is reached, for example by typing control-D on Unix or control-Z on Windows. Subsequent read operations will succeed if additional characters are later entered on the console's input device.
Unless otherwise specified, passing a null argument to any method in this class will cause a {@link NullPointerException} to be thrown.
Security note: If an application needs to read a password or other secure data, it should use {@link #readPassword()} or {@link #readPassword(String,Object)} andmanually zero the returned character array after processing to minimize the lifetime of sensitive data in memory.
```
 {@code Console cons; char[] passwd; if ((cons = System.console()) != null &&}(passwd = cons.readPassword("[%s]", "Password:")) != null)  ... java.util.Arrays.fill(passwd, ' '); } }
```
@author Xueming Shen @since 1.6

    }
  }
  
  @Override
  public boolean promptForIdentity(String message) {
    final Console console = System.console();
    showHeader(console);
    
    final String line = console.readLine("# %s [~/.ssh/id_pub]: ", message);
    final File home = new File(System.getProperty("java.home"));
    
    if (line == null || line.length() == 0) {
      identity = new File(home, ".ssh/id_pub").getAbsolutePath();
      return true;

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    return true;
  }


  @Override
  public void showMessage(String message) {
    final Console console = System.console();
    showHeader(console);
    console.printf("# %s\n#\n", message);
  }

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  public static String[] create(String title, String description, String username, String password) {
    if (!GraphicsEnvironment.isHeadless()) {
      return swingCredentialsDialog(title, description, username, password);
    }


    final Console console = System.console();
    console.printf("#\n# %s\n# %s\n#\n", title, description);
    final String user = console.readLine("# %s: ", username);
    final char[] pass = console.readPassword("# %s: ", password);
    console.printf("#\n");


    return new String[] { user, new String(pass) };
  }

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    public static char[] getSensitiveValue(String passwordPrompt) {
        while (true) {
            if (passwordPrompt == null)
                passwordPrompt = "Enter your password";


            Console console = System.console();


            char[] passwd = console.readPassword(passwordPrompt + ": ");
            char[] passwd1 = console.readPassword(passwordPrompt + " again: ");
            boolean noMatch = !Arrays.equals(passwd, passwd1);
            if (noMatch)
                System.out.println("Values entered don't match");
            else {
                System.out.println("Values match");

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    public VaultInteractiveSession() {
    }


    public void start() {
        Console console = System.console();


        if (console == null) {
            System.err.println("No console.");
            System.exit(1);
        }


        while (encDir == null || encDir.length() == 0 || !(encDir.endsWith("/") || encDir.endsWith("\\"))) {
            encDir = console
                    .readLine("Enter directory to store encrypted files (end with either / or \\ based on Unix or Windows:");
        }


        while (keystoreURL == null || keystoreURL.length() == 0) {
            keystoreURL = console.readLine("Enter Keystore URL:");
        }


        char[] keystorePasswd = getSensitiveValue("Enter Keystore password");


        try {
            maskedPassword = getMaskedPassword(console, new String(keystorePasswd));
            System.out.println("                ");
            System.out.println("Please make note of the following:");
            System.out.println("********************************************");
            System.out.println("Masked Password:" + maskedPassword);
            System.out.println("salt:" + salt);
            System.out.println("Iteration Count:" + iterationCount);
            System.out.println("********************************************");
            System.out.println("                ");
        } catch (Exception e) {
            System.out.println("Exception encountered:" + e.getLocalizedMessage());
        }


        while (keystoreAlias == null || keystoreAlias.length() == 0) {
            keystoreAlias = console.readLine("Enter Keystore Alias:");
        }


        try {
            vault = SecurityVaultFactory.get();
            System.out.println("Obtained Vault");

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     * Asks for the password.
     */
    private static class InteractivelyAskForPassword implements Callable<String,IOException> {
        @IgnoreJRERequirement
        public String call() throws IOException {
            Console console = System.console();
            if (console == null)    return null;    // no terminal


            char[] w = console.readPassword("Password:");
            if (w==null)    return null;
            return new String(w);
        }

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    @Override
    public void login(Credentials credentials) throws IOException, CryptoException {
        System.out.println("Input login:");
        BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(System.in));
        credentials.setUsername(bufferedReader.readLine());
        Console cons = System.console();
        char[] passwd = null;
        if (cons != null) {
            passwd = cons.readPassword("[%s]", "Password:");
        } else {
            System.out.println("Input password(it is not hidden!):");
            passwd = bufferedReader.readLine().toCharArray();
        }
        credentials.setHashedPassword(CryptoUtil.cryptPassword(passwd));

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      Logger.getLogger("com.almworks.sqlite4java").setLevel(Level.OFF);
      Logger.getLogger("com.k42b3.kadabra").setLevel(Level.OFF);




      // start kadabra
      Console console = System.console();
      Kadabra instance = new Kadabra();


      if(args.length == 2 && args[0].equals("status"))
      {
        int id = Integer.parseInt(args[1]);


        instance.status(id);
      }
      else if(args.length == 2 && args[0].equals("release"))
      {
        int id = Integer.parseInt(args[1]);


        instance.release(id);
      }
      else if(args.length == 1 && args[0].equals("list"))
      {
        instance.listProject();
      }
      else if(args.length == 2 && args[0].equals("list") && args[1].equals("resource"))
      {
        instance.listResource();
      }
      else if(args.length == 1 && args[0].equals("add"))
      {
        String name = console.readLine("Name: ");


        String leftPath = console.readLine("Left path: ");
        int legtResourceId = Integer.parseInt(console.readLine("Left resource id: "));


        String rightPath = console.readLine("Right path: ");
        int rightResourceId = Integer.parseInt(console.readLine("Right resource id: "));


        instance.addProject(name, leftPath, legtResourceId, rightPath, rightResourceId);
      }
      else if(args.length == 2 && args[0].equals("add") && args[1].equals("resource"))
      {
        String type = console.readLine("Type [System|Ftp|Ssh]: ").toUpperCase();
        HashMap<String, String> config = new HashMap<String, String>();
        ArrayList<String> configFields = HandlerFactory.factoryConfig(type);


        String name = console.readLine("Name: ");


        for(int i = 0; i < configFields.size(); i++)
        {
          String key = configFields.get(i);
          String value = console.readLine(key + ": ");


          config.put(key, value);
        }


        instance.addResource(type, name, config);
      }
      else if(args.length == 2 && args[0].equals("add") && args[1].equals("exclude"))
      {
        int projectId = Integer.parseInt(console.readLine("Project ID: "));
        String pattern = console.readLine("Pattern: ");


        instance.addExclude(projectId, pattern);
      }
      else if(args.length == 1 && args[0].equals("del"))
      {
        int projectId = Integer.parseInt(console.readLine("Project ID: "));


        instance.deleteProject(projectId);
      }
      else if(args.length == 2 && args[0].equals("del") && args[1].equals("resource"))
      {
        int resourceId = Integer.parseInt(console.readLine("Resource ID: "));


        instance.deleteResource(resourceId);
      }
      else if(args.length == 2 && args[0].equals("del") && args[1].equals("exclude"))
      {
        int excludeId = Integer.parseInt(console.readLine("Exclude ID: "));


        instance.deleteExclude(excludeId);
      }
      else if(args.length == 1 && args[0].equals("build"))
      {

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            case 'e': {
                // Prompt for the property and value to be encoded.
                // Don't use a command line option because the plain text password
                // could get captured in command history.
                Console console = System.console();
                if (null != console) {
                    associatedProperty = "rhq.autoinstall.server.admin.password";
                    if (!confirm(console, "Property " + associatedProperty)) {
                        associatedProperty = "rhq.server.database.password";
                        if (!confirm(console, "Property " + associatedProperty)) {
                            associatedProperty = ask(console, "Property: ");
                        }
                    }


                    String prompt = "Value: ";
                    if (associatedProperty != null && associatedProperty.toLowerCase().contains("password")) {
                        prompt = "Password: ";
                    }


                    valueToEncode = String.valueOf(console.readLine("%s", prompt));
                } else {
                    LOG.error("NO CONSOLE!");
                }


                break;

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        String propertyValue = props.getProperty(propertyName);
        if (StringUtil.isBlank(propertyValue)) {


            // prompt for the property value
            Console console = System.console();
            console.format("\nThe [%s] property is required but not set in [%s].\n", propertyName, propertiesFileName);
            console.format("Do you want to set [%s] value now?\n", propertyName);
            String response = "";
            while (!(response.startsWith("n") || response.startsWith("y"))) {
                response = String.valueOf(console.readLine("%s", "yes|no: ")).toLowerCase();
            }
            if (response.startsWith("n")) {
                throw new RHQControlException("Please update the [" + propertiesFileName + "] file as required.");
            }


            do {
                propertyValue = "";
                while (StringUtil.isBlank(propertyValue)) {
                    if (!hideInput) {
                        propertyValue = String.valueOf(console.readLine("%s", propertyName
                            + (((obfuscate || encode) ? " (enter as plain text): " : ": "))));
                    } else {
                        propertyValue = String.valueOf(console.readPassword("%s", propertyName
                            + (((obfuscate || encode) ? " (enter as plain text): " : ": "))));
                    }
                }


                if (!hideInput) {
                    console.format("Is [" + propertyValue + "] correct?\n");
                    response = "";
                    while (!(response.startsWith("n") || response.startsWith("y"))) {
                        response = String.valueOf(console.readLine("%s", "yes|no: ")).toLowerCase();
                    }
                } else {
                    console.format("Confirm:\n");
                    String confirmValue = String.valueOf(console.readPassword("%s", propertyName
                        + (((obfuscate || encode) ? " (enter as plain text): " : ": "))));
                    if (propertyValue.equals(confirmValue)) {
                        response = "yes";
                    } else {
                        response = "no";
                        console.printf("Did not match. Please try again.\n");
                    }
                }
            } while (response.startsWith("n"));


            propertyValue = obfuscate ? Obfuscator.encode(propertyValue) : propertyValue;

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