Example usage for java.util Scanner Scanner

Introduction

In this page you can find the example usage for java.util Scanner Scanner.

Prototype

public Scanner(ReadableByteChannel source) 

Source Link

Document

Constructs a new Scanner that produces values scanned from the specified channel.

Usage

From source file:Main.java

public static void main(String[] args) {
    char[][] original = new char[3][3];
    Scanner s = new Scanner(System.in);
    System.out.println("Enter values: ");
    for (int i = 0; i < 3; i++) {
        for (int j = 0; j < 3; j++) {
            original[i][j] = s.next().charAt(0);
        }/* www .  j  a v  a 2 s  .com*/
    }
    rotate(original);
}

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From source file:MainClass.java

public static void main(String args[]) throws IOException {

    int i;//from   w w  w  .j  a v  a2s .c om
    double d;
    boolean b;
    String str;

    FileWriter fout = new FileWriter("test.txt");
    fout.write("Testing Scanner 10 12.2 one true two false");
    fout.close();

    FileReader fin = new FileReader("Test.txt");

    Scanner src = new Scanner(fin);

    while (src.hasNext()) {
        if (src.hasNextInt()) {
            i = src.nextInt();
            System.out.println("int: " + i);
        } else if (src.hasNextDouble()) {
            d = src.nextDouble();
            System.out.println("double: " + d);
        } else if (src.hasNextBoolean()) {
            b = src.nextBoolean();
            System.out.println("boolean: " + b);
        } else {
            str = src.next();
            System.out.println("String: " + str);
        }
    }

    fin.close();
}

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From source file:Lab2.java

/**
 * @param args the command line arguments
 *//*from   w w w  .j av  a 2s .  c  om*/
public static void main(String[] args) {
    Preprocessor p = new Preprocessor();
    p.parse();
    Query q;
    boolean cont = true;
    Scanner input = new Scanner(System.in);
    String yesOrNo;
    String oOrC;
    ArrayList<Document> scores;

    System.out.println("Would you like to use cosine similarity or okapi to score queries? (C/O)");
    oOrC = input.nextLine();
    while (cont) {
        System.out.println("Enter a query: ");
        /**
         * We don't need the query class, we can just stem it and stopword it then make a document out of it.
         */
        q = new Query(input.nextLine());

        if (oOrC.equals("O") || oOrC.equals("o")) {
            scores = p.calcQueryOkapiScore(q);
        } else {
            scores = p.calcQueryCosineSimilarity(q);
        }

        System.out.println("Documents returned from cosine similarity analysis on query are: ");
        for (Document doc : scores) {
            System.out.println("Text :" + doc.origUtterance);
        }

        System.out.println("Would you like to enter another? Y/N");
        yesOrNo = input.nextLine();
        if (yesOrNo.equals("N") || yesOrNo.equals("n")) {
            cont = false;
        }
    }
}

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From source file:it.pcan.test.integration.amqp.MainServer.java

/**
 * @param args the command line arguments
 * @throws java.lang.Exception/*from   w ww .  j av  a2 s .co  m*/
 */
public static void main(String[] args) throws Exception {
    try (ClassPathXmlApplicationContext context = new ClassPathXmlApplicationContext(
            "classpath:/config/serverApplicationContext.xml")) {
        new Scanner(System.in).nextLine(); // Press Enter key to stop
        System.out.println("Done.");
    }
}

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From source file:Test.java

public static void main(String[] args) throws Exception {

    AsynchronousSocketChannel client = AsynchronousSocketChannel.open();
    InetSocketAddress address = new InetSocketAddress("localhost", 5000);

    Future<Void> future = client.connect(address);
    System.out.println("Client: Waiting for the connection to complete");
    future.get();/* w  w w  .  j  ava  2s.c  o  m*/

    String message = "";
    while (!message.equals("quit")) {
        System.out.print("Enter a message: ");
        Scanner scanner = new Scanner(System.in);
        message = scanner.nextLine();
        System.out.println("Client: Sending ...");
        ByteBuffer buffer = ByteBuffer.wrap(message.getBytes());
        System.out.println("Client: Message sent: " + new String(buffer.array()));
        client.write(buffer);
    }
}

---

From source file:comparetopics.CompareTwoGroupTopics.java

public static void main(String[] args) {

    Scanner sc = new Scanner(System.in);
    System.out.println("please input the path for File1: ");
    String filepath1 = sc.nextLine();
    System.out.println("please input the path for File2: ");
    String filepath2 = sc.nextLine();

    try {/* ww w  .  j  av  a2 s .  c  o  m*/
        File file1 = new File(filepath1);
        File file2 = new File(filepath2);
        System.out.println("File1: " + filepath1);
        System.out.println("File2: " + filepath2);

        if (!file1.exists()) {
            System.out.println("File1 isn't exist");
        } else if (!file2.exists()) {
            System.out.println("File2 isn't exist");
        } else {
            try (InputStream in1 = new FileInputStream(file1.getPath());
                    BufferedReader reader1 = new BufferedReader(new InputStreamReader(in1))) {

                String line1 = null;
                int lineNr1 = -1;
                while ((line1 = reader1.readLine()) != null) {
                    ++lineNr1;

                    int lineNr2 = -1;
                    String line2 = null;
                    try (InputStream in2 = new FileInputStream(file2.getPath());
                            BufferedReader reader2 = new BufferedReader(new InputStreamReader(in2))) {
                        while ((line2 = reader2.readLine()) != null) {
                            ++lineNr2;
                            compareTwoGroups(line1, line2, lineNr1, lineNr2);
                        }
                    }
                    System.out.println();
                }
            }
        }

    } catch (IOException ex) {
        Logger.getLogger(CompareTopics.class.getName()).log(Level.SEVERE, null, ex);
    }

}

---

From source file:irckafka.ChatApp.java

public static void main(String[] args) {

    groupId = RandomStringUtils.random(8, true, true);

    boolean isOnline = true;

    Scanner in = new Scanner(System.in);
    while (isOnline) {

        String[] input = in.nextLine().split(" ");
        String command = input[0].toLowerCase();

        switch (command) {
        case "/nick":
            if (input.length >= 2) {
                nickname = input[1];//from  w  w  w. j a  v a  2s . c  o m
                System.out.println("your nickname is " + nickname);
            } else {
                System.out.println("write nick name please!");
            }
            break;
        case "/join":
            if (input.length >= 2) {
                KafkaConsumer consume = new KafkaConsumer(groupId, input[1]);
                consume.start();

                channelGroup.put(input[1], consume);
            } else {
                System.out.println("write channel name please!");
            }
            break;
        case "/leave":
            if (input.length >= 2) {
                if (channelGroup.containsKey(input[1])) {
                    KafkaConsumer consume = channelGroup.get(input[1]);
                    consume.shutdown();
                    channelGroup.remove(input[1]);
                    System.out.println("your leave channel " + input[1]);
                } else {
                    System.out.println("wrong channel name!!");
                }
            } else {
                System.out.println("write channel name please!");
            }
            break;
        case "/exit":
            System.out.println("bye");
            System.exit(0);
            break;
        default: //broadcast
            if (command.contains("@")) {
                String channelname = command.substring(1);
                KafkaProducer produce = new KafkaProducer();
                if (channelGroup.containsKey(channelname)) {
                    String message = "";
                    for (int i = 1; i < input.length; i++) {
                        message += input[i] + " ";
                    }
                    produce.sendMessage(channelname, message, nickname);
                }
                produce.closeConnection();
            } else {
                String message = "";
                for (int i = 0; i < input.length; i++) {
                    message += input[i] + " ";
                }

                KafkaProducer produce = new KafkaProducer();
                for (String cList : channelGroup.keySet()) {
                    produce.sendMessage(cList, message, nickname);
                }
                produce.closeConnection();
            }
        }
    }
}

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From source file:math2605.gn_qua.java

/**
 * @param args the command line arguments
 *//*  w  w  w  .j av  a2 s  .  co m*/
public static void main(String[] args) {
    //get file name
    System.out.println("Please enter a file name:");
    Scanner scanner = new Scanner(System.in);
    String fileName = scanner.nextLine();
    List<String[]> pairs = new ArrayList<>();
    //get coordinate pairs and add to arraylist
    try {
        BufferedReader br = new BufferedReader(new FileReader(fileName));
        String line;
        while ((line = br.readLine()) != null) {
            String[] pair = line.split(",");
            pairs.add(pair);
        }
        br.close();
    } catch (Exception e) {
        System.out.println(e.getMessage());
    }

    System.out.println("Please enter the value of a:");
    double a = scanner.nextInt();
    System.out.println("Please enter the value of b:");
    double b = scanner.nextInt();
    System.out.println("Please enter the value of c:");
    double c = scanner.nextInt();
    //init B, vector with 3 coordinates
    RealMatrix B = new Array2DRowRealMatrix(3, 1);
    B.setEntry(0, 0, a);
    B.setEntry(1, 0, b);
    B.setEntry(2, 0, c);

    System.out.println("Please enter the number of iteration for the Gauss-newton:");
    //init N, number of iterations
    int N = scanner.nextInt();

    //init r, vector of residuals
    RealMatrix r = new Array2DRowRealMatrix(pairs.size(), 1);
    setR(pairs, a, b, c, r);

    //init J, Jacobian of r
    RealMatrix J = new Array2DRowRealMatrix(pairs.size(), 3);
    setJ(pairs, a, b, c, r, J);

    System.out.println("J");
    System.out.println(J);
    System.out.println("r");
    System.out.println(r);

    RealMatrix sub = findQR(J, r);

    for (int i = N; i > 0; i--) {
        B = B.subtract(sub);
        double B0 = B.getEntry(0, 0);
        double B1 = B.getEntry(1, 0);
        double B2 = B.getEntry(2, 0);
        //CHANGE ABC TO USE B0, B1, B2
        setR(pairs, B0, B1, B2, r);
        setJ(pairs, B0, B1, B2, r, J);
    }
    System.out.println("B");
    System.out.println(B.toString());
}

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From source file:javaapplicationclientrest.JavaApplicationClientRest.java

/**
 * @param args the command line arguments
 *///ww  w . j a  v  a2  s . c  o m
public static void main(String[] args) {

    Scanner input = new Scanner(System.in);

    ControllerCliente controller = new ControllerCliente();
    while (true) {
        controller.getMenu();

        int op = 0;
        try {
            op = Integer.parseInt(input.nextLine());
        } catch (Exception e) {
        }

        //input.nextLine();
        switch (op) {
        case 1:
            controller.listarNoticias();
            break;
        case 2:

            System.out.println("Informe o titulo: ");
            String titulo = input.nextLine();
            if (titulo.trim().equals("")) {
                System.out.println("Ttulo invlido");
                break;
            }
            System.out.println("Informe o autor: ");
            String autor = input.nextLine();
            if (autor.trim().equals("")) {
                System.out.println("Autor invlido");
                break;
            }
            System.out.println("Informe o Conteudo: ");
            String conteudo = input.nextLine();
            if (conteudo.trim().equals("")) {
                System.out.println("Conteudo invlido");
                break;
            }
            //System.out.println(id);
            controller.cadastrarNoticia(titulo, autor, conteudo);
            break;

        case 3:

            try {
                System.out.println("Informe o id da notcia a ser removida: ");
                String idN = input.nextLine();
                Integer.parseInt(idN);
                controller.removerNoticia(idN);
            } catch (Exception e) {
                System.out.println("Numero invlido");
            }
            break;
        case 4:
            try {
                System.out.println("Informe o Id da notcia desejada:");
                String idN = input.nextLine();
                Integer.parseInt(idN);
                controller.getNoticia(idN);
            } catch (Exception e) {
                System.out.println("Id invlido");
                break;
            }
            break;
        case 5:
            try {
                System.out.println("Informe o Id da notcia para ser atualizada:");
                String idA = input.nextLine();
                Integer.parseInt(idA);
                System.out.println("Informe o novo titulo: ");
                String tituloN = input.nextLine();
                controller.atualizarNoticia(idA, tituloN);
            } catch (Exception e) {
                System.out.println("Id invlido");
            }
            break;

        default:
            System.out.println("Opo invlida. Escolha uma opo novamente");
            break;
        } // End switch
    } // End while

}

---

From source file:com.mycompany.test.Jaroop.java

/**
 * This is the main program which will receive the request, calls required methods
 * and processes the response.//from  ww w. ja va  2s . c o m
 * @param args
 * @throws IOException
 */
public static void main(String[] args) throws IOException {
    Scanner scannedInput = new Scanner(System.in);
    String in = "";
    if (args.length == 0) {
        System.out.println("Enter the query");
        in = scannedInput.nextLine();
    } else {
        in = args[0];
    }
    in = in.toLowerCase().replaceAll("\\s+", "_");
    int httpStatus = checkInvalidInput(in);
    if (httpStatus == 0) {
        System.out.print("Not found");
        System.exit(0);
    }
    String url = "https://en.wikipedia.org/w/api.php?format=json&action=query&prop=extracts&exintro=&explaintext=&titles="
            + in;
    HttpURLConnection connection = getConnection(url);
    BufferedReader input = new BufferedReader(new InputStreamReader(connection.getInputStream()));
    String request = "";
    StringBuilder response = new StringBuilder();
    while ((request = input.readLine()) != null) {
        //only appending what ever is required for JSON parsing and ignoring the rest
        response.append("{");
        //appending the key "extract" to the string so that the JSON parser can parse it's value,
        //also we don't need last 3 paranthesis in the response, excluding them as well.
        response.append(request.substring(request.indexOf("\"extract"), request.length() - 3));
    }
    parseJSON(response.toString());
}

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