Example usage for java.util Iterator hasNext

Introduction

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

Prototype

boolean hasNext();

Source Link

Document

Returns true if the iteration has more elements.

Usage

From source file:Main.java

public static void main(String[] args) {
    ArrayList<String> list = new ArrayList<String>();

    list.add("Monday");
    list.add("Tuesdag");
    list.add("Wednesday");
    list.add("Thursday");
    list.add("Friday");
    list.add("Saturday");
    list.add("Sunday");

    Iterator<String> iterator = null;

    iterator = list.iterator();/*from  w  w  w.  ja  v  a 2s.co m*/
    while (iterator.hasNext()) {
        String element = iterator.next();
        System.out.println(element);
    }

    for (iterator = list.iterator(); iterator.hasNext();) {
        String element = iterator.next();
        System.out.println(element);
    }

    for (String element : list) {
        System.out.println(element);
    }
}

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From source file:Main.java

public static void main(String[] argv) throws Exception {
    ImageInputStream imageStream = ImageIO.createImageInputStream(new URL("").openStream());
    Iterator<ImageReader> readers = ImageIO.getImageReaders(imageStream);
    ImageReader reader = null;//  w w  w  .  j ava 2 s.  com
    if (!readers.hasNext()) {
        imageStream.close();
        return;
    } else {
        reader = readers.next();
    }
    String formatName = reader.getFormatName();
    if (!formatName.equalsIgnoreCase("jpeg") && !formatName.equalsIgnoreCase("png")
            && !formatName.equalsIgnoreCase("gif")) {
        imageStream.close();
        return;
    }
    reader.setInput(imageStream, true, true);
    BufferedImage theImage = reader.read(0);
    reader.dispose();
    imageStream.close();
}

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From source file:au.org.ands.vocabs.toolkit.db.DumpAccessPointsData.java

/**
 * Main program./*from  w  ww  .j  a v  a  2 s.co  m*/
 * @param args Command-line arguments
 */
public static void main(final String[] args) {
    List<AccessPoint> aps = AccessPointUtils.getAllAccessPoints();
    for (AccessPoint ap : aps) {
        System.out.println(ap.getId());
        System.out.println(ap.getVersionId());
        System.out.println(ap.getType());
        String pd = ap.getPortalData();
        String td = ap.getToolkitData();

        System.out.println("portal_data:");
        JsonNode pdJson = TaskUtils.jsonStringToTree(pd);
        Iterator<Entry<String, JsonNode>> pdJsonIterator = pdJson.fields();
        while (pdJsonIterator.hasNext()) {
            Entry<String, JsonNode> entry = pdJsonIterator.next();
            System.out.println(entry.getKey() + "=" + entry.getValue().asText());
        }

        System.out.println("toolkit_data:");
        JsonNode tdJson = TaskUtils.jsonStringToTree(td);
        Iterator<Entry<String, JsonNode>> tdJsonIterator = tdJson.fields();
        while (tdJsonIterator.hasNext()) {
            Entry<String, JsonNode> entry = tdJsonIterator.next();
            System.out.println(entry.getKey() + "=" + entry.getValue().asText());
        }

    }
}

---

From source file:cat.tv3.eng.rec.recomana.lupa.visualization.RecommendationToJson.java

public static void main(String[] args) throws IOException {
    final int TOTAL_WORDS = 20;
    String host = args[0];//from w  w  w  .j a  v  a  2 s  .  c o  m
    int port = Integer.parseInt(args[1]);
    Jedis jedis = new Jedis(host, port, 20000);

    String[] recommendation_keys = jedis.keys("recommendations_*").toArray(new String[0]);

    for (int i = 0; i < recommendation_keys.length; ++i) {
        JSONArray recommendations = new JSONArray();
        String[] split_reco_name = recommendation_keys[i].split("_");
        String id = split_reco_name[split_reco_name.length - 1];

        Set<Tuple> recos = jedis.zrangeWithScores(recommendation_keys[i], 0, -1);
        Iterator<Tuple> it = recos.iterator();

        while (it.hasNext()) {
            Tuple t = it.next();

            JSONObject new_reco = new JSONObject();
            new_reco.put("id", t.getElement());
            new_reco.put("distance", (double) Math.round(t.getScore() * 10000) / 10000);

            recommendations.add(new_reco);
        }
        saveResults(recommendations, id);
    }
    jedis.disconnect();
}

---

From source file:LinkedListTest.java

public static void main(String[] args) {
    List<String> a = new LinkedList<String>();
    a.add("Amy");
    a.add("Carl");
    a.add("Erica");

    List<String> b = new LinkedList<String>();
    b.add("Bob");
    b.add("Doug");
    b.add("Frances");
    b.add("Gloria");

    // merge the words from b into a

    ListIterator<String> aIter = a.listIterator();
    Iterator<String> bIter = b.iterator();

    while (bIter.hasNext()) {
        if (aIter.hasNext())
            aIter.next();/*from w  w  w  . j a va  2 s. c  o  m*/
        aIter.add(bIter.next());
    }

    System.out.println(a);

    // remove every second word from b

    bIter = b.iterator();
    while (bIter.hasNext()) {
        bIter.next(); // skip one element
        if (bIter.hasNext()) {
            bIter.next(); // skip next element
            bIter.remove(); // remove that element
        }
    }

    System.out.println(b);

    // bulk operation: remove all words in b from a

    a.removeAll(b);

    System.out.println(a);
}

---

From source file:Main.java

public static void main(String[] args) throws IOException {
    URL[] urls = { new URL("http://yourserver/small.png") };
    for (URL url : urls) {
        ImageInputStream iis = ImageIO.createImageInputStream(url.openStream());
        Iterator<ImageReader> readers = ImageIO.getImageReaders(iis);

        System.out.println("url= " + url.getPath());
        while (readers.hasNext()) {
            ImageReader read = readers.next();
            System.out.println("format name = " + read.getFormatName());
        }//from ww w.  j  a  v  a2s.  c  o  m
        System.out.println();
    }
}

---

From source file:chat.jsonTest.java

/**
 * @param args the command line arguments
 *//*from w w  w.  j a  v a2  s . c  om*/
public static void main(String[] args) throws ParseException, IOException {
    // TODO code application logic here
    JSONParser parser = new JSONParser();
    String fullPath = "userInfo.json";
    //BufferedReader reader = new BufferedReader(new FileReader(fullPath));

    Object obj = parser.parse(new FileReader("userInfo.json"));
    JSONObject jsonObject = (JSONObject) obj;
    /*while ((line = reader.readLine()) != null) {
        System.out.println(line);
    }*/
    JSONArray lang = (JSONArray) jsonObject.get("userInfo");
    Iterator i = lang.iterator();

    // take each value from the json array separately
    while (i.hasNext()) {
        JSONObject innerObj = (JSONObject) i.next();
        System.out
                .println("username " + innerObj.get("username") + " with password " + innerObj.get("password"));
    }

}

---

From source file:be.dnsbelgium.rdap.client.ManGenerator.java

public static void main(String[] args) {
    Options options = new RDAPOptions(Locale.ENGLISH);
    Iterator<Option> it = options.getOptions().iterator();
    StringBuilder sb = new StringBuilder();
    while (it.hasNext()) {
        Option option = it.next();
        sb.append(String.format(".IP \"%s\"\n%s\n", getOptionString(option),
                option.getDescription() == null ? "" : option.getDescription()));
    }/*from w w  w. j ava  2 s. c  o m*/
    System.out.println(sb.toString());
}

---

From source file:CAList.java

/**
 * <p><!-- Method description --></p>
 *
 *
 * @param args/*w ww . ja v a  2s .c  o m*/
 */
public static void main(String[] args) {
    try {
        // Load the JDK's cacerts keystore file
        String filename = System.getProperty("java.home")
                + "/lib/security/cacerts".replace('/', File.separatorChar);
        FileInputStream is = new FileInputStream(filename);
        KeyStore keystore = KeyStore.getInstance(KeyStore.getDefaultType());
        String password = "changeit";
        keystore.load(is, password.toCharArray());

        // This class retrieves the most-trusted CAs from the keystore
        PKIXParameters params = new PKIXParameters(keystore);

        // Get the set of trust anchors, which contain the most-trusted CA certificates
        Iterator it = params.getTrustAnchors().iterator();
        for (; it.hasNext();) {
            TrustAnchor ta = (TrustAnchor) it.next();

            // Get certificate
            X509Certificate cert = ta.getTrustedCert();
            System.out.println("<issuer>" + cert.getIssuerDN() + "</issuer>\n");
        }
    } catch (CertificateException e) {
    } catch (KeyStoreException e) {
    } catch (NoSuchAlgorithmException e) {
    } catch (InvalidAlgorithmParameterException e) {
    } catch (IOException e) {
    }
}

---

From source file:Main.java

public static void main(String[] args) {

    ArrayList<String> aList = new ArrayList<String>();

    aList.add("1");
    aList.add("2");
    aList.add("3");
    aList.add("4");
    aList.add("5");

    Iterator itr = aList.iterator();

    // iterate through the ArrayList values using Iterator's hasNext and next methods

    while (itr.hasNext()) {
        System.out.println(itr.next());
    }/*from   ww w. j a  va2s .  com*/
}

---

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