Example usage for java.lang Integer parseInt

Introduction

In this page you can find the example usage for java.lang Integer parseInt.

Prototype

public static int parseInt(String s) throws NumberFormatException 

Source Link

Document

Parses the string argument as a signed decimal integer.

Usage

From source file:FactQuoter.java

public static void main(String[] args) throws IOException {
    // This is how we set things up to read lines of text from the user.
    BufferedReader in = new BufferedReader(new InputStreamReader(System.in));
    // Loop forever
    for (;;) {//from  www. j a va 2 s  .  c om
        // Display a prompt to the user
        System.out.print("FactQuoter> ");
        // Read a line from the user
        String line = in.readLine();
        // If we reach the end-of-file,
        // or if the user types "quit", then quit
        if ((line == null) || line.equals("quit"))
            break;
        // Try to parse the line, and compute and print the factorial
        try {
            int x = Integer.parseInt(line);
            System.out.println(x + "! = " + Factorial4.factorial(x));
        }
        // If anything goes wrong, display a generic error message
        catch (Exception e) {
            System.out.println("Invalid Input");
        }
    }
}

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From source file:com.xpfriend.fixture.runner.example.ExampleJob.java

/**
 *  TEST_FB ???//from   w ww  .  ja va2  s .com
 * @param args 1:?ID?2:??NAME?
 */
public static void main(String[] args) throws Exception {
    if (args.length < 2) {
        throw new IllegalArgumentException("args.length == " + args.length);
    }
    int id = Integer.parseInt(args[0]);
    String name = args[1];

    Connection connection = getConnection();
    try {
        updateDatabase(id, name, connection);
        connection.commit();
    } finally {
        connection.close();
    }
}

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From source file:example.Publisher.java

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

    String user = env("ACTIVEMQ_USER", "admin");
    String password = env("ACTIVEMQ_PASSWORD", "password");
    String host = env("ACTIVEMQ_HOST", "localhost");
    int port = Integer.parseInt(env("ACTIVEMQ_PORT", "1883"));
    final String destination = arg(args, 0, "/topic/event");

    int messages = 10000;
    int size = 256;

    String DATA = "abcdefghijklmnopqrstuvwxyz";
    String body = "";
    for (int i = 0; i < size; i++) {
        body += DATA.charAt(i % DATA.length());
    }/*from   ww w  . j  av  a2  s.c  o m*/
    Buffer msg = new AsciiBuffer(body);

    MQTT mqtt = new MQTT();
    mqtt.setHost(host, port);
    mqtt.setUserName(user);
    mqtt.setPassword(password);

    FutureConnection connection = mqtt.futureConnection();
    connection.connect().await();

    final LinkedList<Future<Void>> queue = new LinkedList<Future<Void>>();
    UTF8Buffer topic = new UTF8Buffer(destination);
    for (int i = 1; i <= messages; i++) {

        // Send the publish without waiting for it to complete. This allows us
        // to send multiple message without blocking..
        queue.add(connection.publish(topic, msg, QoS.AT_LEAST_ONCE, false));

        // Eventually we start waiting for old publish futures to complete
        // so that we don't create a large in memory buffer of outgoing message.s
        if (queue.size() >= 1000) {
            queue.removeFirst().await();
        }

        if (i % 1000 == 0) {
            System.out.println(String.format("Sent %d messages.", i));
        }
    }

    queue.add(connection.publish(topic, new AsciiBuffer("SHUTDOWN"), QoS.AT_LEAST_ONCE, false));
    while (!queue.isEmpty()) {
        queue.removeFirst().await();
    }

    connection.disconnect().await();

    System.exit(0);
}

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From source file:io.minimum.minecraft.rbclean.RedisBungeeClean.java

public static void main(String... args) {
    Options options = new Options();

    Option hostOption = new Option("h", "host", true, "Sets the Redis host to use.");
    hostOption.setRequired(true);//w w w.  j a  va 2 s  . c om
    options.addOption(hostOption);

    Option portOption = new Option("p", "port", true, "Sets the Redis port to use.");
    options.addOption(portOption);

    Option passwordOption = new Option("w", "password", true, "Sets the Redis password to use.");
    options.addOption(passwordOption);

    Option dryRunOption = new Option("d", "dry-run", false, "Performs a dry run (no data is modified).");
    options.addOption(dryRunOption);

    CommandLine commandLine;

    try {
        commandLine = new DefaultParser().parse(options, args);
    } catch (ParseException e) {
        HelpFormatter formatter = new HelpFormatter();
        formatter.printHelp("RedisBungeeClean", options);
        return;
    }

    int port = commandLine.hasOption('p') ? Integer.parseInt(commandLine.getOptionValue('p')) : 6379;

    try (Jedis jedis = new Jedis(commandLine.getOptionValue('h'), port, 0)) {
        if (commandLine.hasOption('w')) {
            jedis.auth(commandLine.getOptionValue('w'));
        }

        System.out.println("Fetching UUID cache...");
        Map<String, String> uuidCache = jedis.hgetAll("uuid-cache");
        Gson gson = new Gson();

        // Just in case we need it, compress everything in JSON format.
        if (!commandLine.hasOption('d')) {
            SimpleDateFormat dateFormat = new SimpleDateFormat("yyyy-MM-dd-hh-mm-ss");
            File file = new File("uuid-cache-previous-" + dateFormat.format(new Date()) + ".json.gz");
            try {
                file.createNewFile();
            } catch (IOException e) {
                System.out.println("Can't write backup of the UUID cache, will NOT proceed.");
                e.printStackTrace();
                return;
            }

            System.out.println("Creating backup (as " + file.getName() + ")...");

            try (OutputStreamWriter bw = new OutputStreamWriter(
                    new GZIPOutputStream(new FileOutputStream(file)))) {
                gson.toJson(uuidCache, bw);
            } catch (IOException e) {
                System.out.println("Can't write backup of the UUID cache, will NOT proceed.");
                e.printStackTrace();
                return;
            }
        }

        System.out.println("Cleaning out the bird cage (this may take a while...)");
        int originalSize = uuidCache.size();
        for (Iterator<Map.Entry<String, String>> it = uuidCache.entrySet().iterator(); it.hasNext();) {
            CachedUUIDEntry entry = gson.fromJson(it.next().getValue(), CachedUUIDEntry.class);

            if (entry.expired()) {
                it.remove();
            }
        }
        int newSize = uuidCache.size();

        if (commandLine.hasOption('d')) {
            System.out.println(
                    (originalSize - newSize) + " records would be expunged if a dry run was not conducted.");
        } else {
            System.out.println("Expunging " + (originalSize - newSize) + " records...");
            Transaction transaction = jedis.multi();
            transaction.del("uuid-cache");
            transaction.hmset("uuid-cache", uuidCache);
            transaction.exec();
            System.out.println("Expunging complete.");
        }
    }
}

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From source file:Factorial.java

/**
* The main method from which the program executes;
* it handles all I/O and method execution.
*
* @param args Arguments received from the command line (one number).
* @param factorial The calculated Factorial of args[0].
*//*from  w w  w .j  a va2  s.  c  o  m*/
public static void main(String[] args) {
    // ensure the user only enters one argument
    if (args.length == 1) {
        // ensure the users argument is a number
        try {
            // calculate factorial
            double factorial = calcFactorial(Integer.parseInt(args[0]));

            System.out.println("The Factorial of " + args[0] + " is " + factorial + ".");
        } catch (NumberFormatException c) {
            System.out.println("Your argument must be in " + "the form of an integer when "
                    + "running the program (ex. " + "enter 'java numeric." + "Factorial 5').");
        } catch (Exception c) {
            // used only in GUI
        }
    } else {
        System.out.println("Enter one number as an argument " + "when running the program (ex. "
                + "enter 'java numeric.Factorial 5').");
    }
}

---

From source file:org.eclipse.swt.snippets.Snippet289.java

public static void main(String[] args) {
    Display display = new Display();
    Shell shell = new Shell(display);
    shell.setText("Snippet 289");
    shell.setLayout(new FillLayout());
    final Combo combo = new Combo(shell, SWT.NONE);
    combo.setItems("1111", "2222", "3333", "4444");
    combo.setText(combo.getItem(0));/*from   w w w .j  a va 2s.co  m*/
    combo.addVerifyListener(e -> {
        String text = combo.getText();
        String newText = text.substring(0, e.start) + e.text + text.substring(e.end);
        try {
            if (newText.length() != 0)
                Integer.parseInt(newText);
        } catch (NumberFormatException ex) {
            e.doit = false;
        }
    });
    combo.addTraverseListener(e -> {
        if (e.detail == SWT.TRAVERSE_RETURN) {
            e.doit = false;
            e.detail = SWT.TRAVERSE_NONE;
            String newText = combo.getText();
            try {
                Integer.parseInt(newText);
                combo.add(newText);
                combo.setSelection(new Point(0, newText.length()));
            } catch (NumberFormatException ex) {
            }
        }
    });

    shell.pack();
    shell.open();
    while (!shell.isDisposed()) {
        if (!display.readAndDispatch())
            display.sleep();
    }
    display.dispose();
}

---

From source file:TreeHeap.java

public static void main(String[] args) {
    Heap heap = new TreeHeap(5);
    for (int ai = 0; ai < args.length; ai++) {
        heap.add(Integer.valueOf(Integer.parseInt(args[ai])));
    }//w  ww.  java  2  s. co m
    while (!heap.isEmpty()) {
        System.out.print(heap.extract() + " ");
    }
    System.out.println();
}

---

From source file:org.zaizi.sensefy.api.SensefyResourceApplication.java

public static void main(String[] args) {
    SpringApplication.run(SensefyResourceApplication.class, args);
    int port = Integer.parseInt(System.getProperty("jetty.port", "8080"));
    int requestHeaderSize = Integer.parseInt(System.getProperty("jetty.header.size", "65536"));
    Server server = new Server(port);
    server.setAttribute("org.eclipse.jetty.server.Request.maxFormContentSize", -1);
    ProtectionDomain domain = SensefyResourceApplication.class.getProtectionDomain();
    URL location = domain.getCodeSource().getLocation();

    // Set request header size
    //   server.getConnectors()[0].setRequestHeaderSize(requestHeaderSize);

    WebAppContext webapp = new WebAppContext();
    webapp.setContextPath("/api");
    webapp.setDescriptor(location.toExternalForm() + "/WEB-INF/web.xml");
    webapp.setServer(server);/* w w  w .  j av  a 2s .  c o m*/
    webapp.setWar(location.toExternalForm());

    // (Optional) Set the directory the war will extract to.
    // If not set, java.io.tmpdir will be used, which can cause problems
    // if the temp directory gets cleaned periodically.
    // Your build scripts should remove this directory between deployments
    // webapp.setTempDirectory(new File("/path/to/webapp-directory"));

    server.setHandler(webapp);
    try {
        server.start();
        server.join();
    } catch (Exception e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    }

}

---

From source file:edu.cuhk.hccl.SequenceFileWriter.java

public static void main(String[] args) throws IOException {
    // Check parameters
    if (args.length < 3) {
        System.out.print("Please specify three parameters!");
        System.exit(-1);//from   www.ja v a 2s  .  c  om
    }

    File filesDir = new File(args[0]);
    String targetDir = args[1];
    final int NUM_SPLITS = Integer.parseInt(args[2]);

    // Remove old target directory first
    FileUtils.deleteQuietly(new File(targetDir));

    File[] dataFiles = filesDir.listFiles();

    int total = dataFiles.length;
    int range = (int) Math.round(total / NUM_SPLITS + 0.5);
    System.out.printf("[INFO] The number of total files is %d \n.", total);

    for (int i = 1; i <= NUM_SPLITS; i++) {
        int start = (i - 1) * range;
        int end = Math.min(start + range, total);
        File[] subFiles = Arrays.copyOfRange(dataFiles, start, end);
        createSeqFile(subFiles, FilenameUtils.normalize(targetDir + "/" + i + ".seq"));
    }

    System.out.println("[INFO] All files have been successfully processed!");
}

---

From source file:com.owly.clnt.OwlyClnt.java

/**
 * @param args//from   w w w .j a  v  a  2 s .c  o m
 *            First argument in the port where webserver is going to start
 */
public static void main(String[] args) {

    Logger log = Logger.getLogger(OwlyClnt.class);
    log.debug("Executing OwlyClnt");

    if (args.length == 1) {

        String clientport = args[0];
        setPort(Integer.parseInt(clientport));
        log.debug("Port to run  :" + clientport);

        // URL used for generating the VMstat of the server
        get(new Route("/OwlyClnt/Stats_Vmstat") {
            @Override
            public Object handle(Request request, Response response) {

                Logger log = Logger.getLogger(OwlyClnt.class);
                log.debug("Calling Stats_Vmstat");

                OSValidator osValidator = new OSValidator();
                log.debug("operating System " + osValidator.getOS());

                JSONObject json = new JSONObject();

                if (osValidator.isWindows()) {

                    StatsWinTypeperf testStats = new StatsWinTypeperf();

                    try {
                        json = testStats.getWinTypeperf();

                    } catch (Exception e) {
                        // TODO Auto-generated catch block
                        e.printStackTrace();
                    }
                } else {
                    if (OSValidator.isUnix()) {

                        StatsVmstat testStats = new StatsVmstat();

                        try {
                            json = testStats.getJSONVmStat();
                        } catch (Exception e) {
                            // TODO Auto-generated catch block
                            e.printStackTrace();
                        }
                    } else {
                        json.put("StatType", "NOK");

                    }

                }

                return json.toString();

            }

        });

        // URL used for generating the TopCPU of the server
        get(new Route("/OwlyClnt/Stats_TopCPU") {
            @Override
            public Object handle(Request request, Response response) {

                Logger log = Logger.getLogger(OwlyClnt.class);
                log.debug("Calling Stats_Vmstat");

                OSValidator osValidator = new OSValidator();
                log.debug("operating System " + osValidator.getOS());

                JSONObject topCpuStatJson = new JSONObject();

                if (OSValidator.isUnix()) {

                    StatsTopCpu testStats = new StatsTopCpu();

                    try {
                        topCpuStatJson = testStats.getJSONTopCpu();
                    } catch (Exception e) {
                        // TODO Auto-generated catch block
                        e.printStackTrace();
                    }

                } else {
                    topCpuStatJson.put("StatType", "NOK");

                }

                return topCpuStatJson.toString();
            }
        });

        // Url used for executing a healthcheck and see if the server is
        // available
        get(new Route("/healthCheck") {
            @Override
            public Object handle(Request request, Response response) {

                JSONObject objJSON = new JSONObject();
                objJSON.put("StatusServer", "OK");

                return objJSON.toString();
            }
        });

    } else {
        System.out.println("ERROR : you need to specify port number -> ./OwlyClnt port ");
    }

}

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