Example usage for java.util HashMap HashMap

Introduction

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

Prototype

public HashMap(Map<? extends K, ? extends V> m) 

Source Link

Document

Constructs a new HashMap with the same mappings as the specified Map .

Usage

From source file:Main.java

public static void main(String[] a) {
    HashMap<String, String> map = new HashMap<String, String>(10);
    map.put("key1", "value1");
    map.put("key2", "value2");
    map.put("key3", "value3");

    System.out.println(map);// w  w w .jav a  2s .co  m
}

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From source file:Main.java

public static void main(String[] args) {

    String sentence = "is this a sentence this is a test";
    String[] myStringArray = sentence.split("\\s"); // Split the sentence by
                                                    // space.

    Map<String, Integer> wordOccurrences = new HashMap<String, Integer>(myStringArray.length);

    for (String word : myStringArray) {
        if (wordOccurrences.containsKey(word)) {
            wordOccurrences.put(word, wordOccurrences.get(word) + 1);
        } else {/*w w  w . j  ava2 s  .c o m*/
            wordOccurrences.put(word, 1);
        }
    }
    for (String word : wordOccurrences.keySet()) {
        if (wordOccurrences.get(word) > 1) {
            System.out.println("1b. - Tokens that occurs more than once: " + word + "\n");
        }
    }
}

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From source file:Main.java

public static void main(String[] args) {
    Properties properties = new Properties();

    properties.setProperty("name", "Designer");
    properties.setProperty("version", "1.0");
    properties.setProperty("vendor", "Inc");

    Map<String, String> map = new HashMap<String, String>((Map) properties);

    Set propertySet = map.entrySet();
    for (Object o : propertySet) {
        Map.Entry entry = (Map.Entry) o;
        System.out.printf("%s = %s%n", entry.getKey(), entry.getValue());
    }/* w  w w.j  a v  a  2  s .  c  o  m*/
}

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From source file:Main.java

public static void main(String args[]) {

    Properties prop = new Properties();

    prop.setProperty("A", "t@h.com");
    prop.setProperty("B", "k@h.com");
    prop.setProperty("C", "R@h.com");
    prop.setProperty("D", "S@h.com");

    HashMap<String, String> propMap = new HashMap<String, String>((Map) prop);

    Set<Map.Entry<String, String>> propSet;
    propSet = propMap.entrySet();//from w  ww  .j a  va2 s. co m

    System.out.println("Contents of map: ");
    for (Map.Entry<String, String> me : propSet) {
        System.out.print(me.getKey() + ": ");
        System.out.println(me.getValue());
    }
}

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From source file:example.Main.java

public static void main(String[] args) throws Exception {
    Class[] classes = new Class[3];
    classes[0] = A.class;
    classes[1] = B.class;
    classes[2] = C.class;

    JAXBContext jc = JAXBContext.newInstance(classes);

    JAXBIntrospector ji = jc.createJAXBIntrospector();
    Map<QName, Class> classByQName = new HashMap<QName, Class>(classes.length);
    for (Class clazz : classes) {
        QName qName = ji.getElementName(clazz.newInstance());
        if (null != qName) {
            classByQName.put(qName, clazz);
        }/*from   www . j  a  v  a2  s  .co m*/
    }

    QName qName = new QName("http://www.example.com", "EH");
    System.out.println(classByQName.get(qName));
}

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From source file:MainClass.java

public static void main(String args[]) {
    Set simpsons = new HashSet();
    simpsons.add("B");
    simpsons.add("H");
    simpsons.add("L");
    simpsons = Collections.synchronizedSet(simpsons);
    synchronized (simpsons) {
        Iterator iter = simpsons.iterator();
        while (iter.hasNext()) {
            System.out.println(iter.next());
        }/*from www  .j av a2 s.co  m*/
    }
    Map map = Collections.synchronizedMap(new HashMap(89));
    Set set = map.entrySet();
    synchronized (map) {
        Iterator iter = set.iterator();
        while (iter.hasNext()) {
            System.out.println(iter.next());
        }
    }
}

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From source file:SyncTest.java

public static void main(String args[]) {
    Set simpsons = new HashSet();
    simpsons.add("Bart");
    simpsons.add("Hugo");
    simpsons.add("Lisa");
    simpsons.add("Marge");
    simpsons.add("Homer");
    simpsons.add("Maggie");
    simpsons.add("Roy");
    simpsons = Collections.synchronizedSet(simpsons);
    synchronized (simpsons) {
        Iterator iter = simpsons.iterator();
        while (iter.hasNext()) {
            System.out.println(iter.next());
        }/*from   w  w w  . j a  va2  s  . c om*/
    }
    Map map = Collections.synchronizedMap(new HashMap(89));
    Set set = map.entrySet();
    synchronized (map) {
        Iterator iter = set.iterator();
        while (iter.hasNext()) {
            System.out.println(iter.next());
        }
    }
}

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From source file:io.rodeo.chute.ChuteMain.java

public static void main(String[] args)
        throws SQLException, JsonParseException, JsonMappingException, IOException {
    InputStream is = new FileInputStream(new File(CONFIG_FILENAME));
    ObjectMapper mapper = new ObjectMapper(new YAMLFactory());
    mapper.setPropertyNamingStrategy(PropertyNamingStrategy.SNAKE_CASE);
    ChuteConfiguration config = mapper.readValue(is, ChuteConfiguration.class);
    Map<String, Importer> importManagers = new HashMap<String, Importer>(config.importerConfigurations.size());
    for (Entry<String, ImporterConfiguration> importerConfig : config.importerConfigurations.entrySet()) {
        importManagers.put(importerConfig.getKey(), importerConfig.getValue().createImporter());
    }/*from  w  w w . j  a  va  2s  . c  om*/
    Map<String, Exporter> exportManagers = new HashMap<String, Exporter>(config.exporterConfigurations.size());
    for (Entry<String, ExporterConfiguration> exporterConfig : config.exporterConfigurations.entrySet()) {
        exportManagers.put(exporterConfig.getKey(), exporterConfig.getValue().createExporter());
    }
    for (Entry<String, ConnectionConfiguration> connectionConfig : config.connectionConfigurations.entrySet()) {
        importManagers.get(connectionConfig.getValue().in)
                .addProcessor(exportManagers.get(connectionConfig.getValue().out));
    }

    for (Entry<String, Exporter> exportManager : exportManagers.entrySet()) {
        exportManager.getValue().start();
    }

    for (Entry<String, Importer> importManager : importManagers.entrySet()) {
        importManager.getValue().start();
    }
}

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From source file:com.yahoo.labs.samoa.topology.impl.StormTopologySubmitter.java

public static void main(String[] args) throws IOException {
    Properties props = StormSamoaUtils.getProperties();

    String uploadedJarLocation = props.getProperty(StormJarSubmitter.UPLOADED_JAR_LOCATION_KEY);
    if (uploadedJarLocation == null) {
        logger.error("Invalid properties file. It must have key {}",
                StormJarSubmitter.UPLOADED_JAR_LOCATION_KEY);
        return;/*from w ww  .  j a  v  a  2 s .c  o  m*/
    }

    List<String> tmpArgs = new ArrayList<String>(Arrays.asList(args));
    int numWorkers = StormSamoaUtils.numWorkers(tmpArgs);

    args = tmpArgs.toArray(new String[0]);
    StormTopology stormTopo = StormSamoaUtils.argsToTopology(args);

    Config conf = new Config();
    conf.putAll(Utils.readStormConfig());
    conf.putAll(Utils.readCommandLineOpts());
    conf.setDebug(false);
    conf.setNumWorkers(numWorkers);

    String profilerOption = props.getProperty(StormTopologySubmitter.YJP_OPTIONS_KEY);
    if (profilerOption != null) {
        String topoWorkerChildOpts = (String) conf.get(Config.TOPOLOGY_WORKER_CHILDOPTS);
        StringBuilder optionBuilder = new StringBuilder();
        if (topoWorkerChildOpts != null) {
            optionBuilder.append(topoWorkerChildOpts);
            optionBuilder.append(' ');
        }
        optionBuilder.append(profilerOption);
        conf.put(Config.TOPOLOGY_WORKER_CHILDOPTS, optionBuilder.toString());
    }

    Map<String, Object> myConfigMap = new HashMap<String, Object>(conf);
    StringWriter out = new StringWriter();

    try {
        JSONValue.writeJSONString(myConfigMap, out);
    } catch (IOException e) {
        System.out.println("Error in writing JSONString");
        e.printStackTrace();
        return;
    }

    Config config = new Config();
    config.putAll(Utils.readStormConfig());

    String nimbusHost = (String) config.get(Config.NIMBUS_HOST);

    NimbusClient nc = new NimbusClient(nimbusHost);
    String topologyName = stormTopo.getTopologyName();
    try {
        System.out.println("Submitting topology with name: " + topologyName);
        nc.getClient().submitTopology(topologyName, uploadedJarLocation, out.toString(),
                stormTopo.getStormBuilder().createTopology());
        System.out.println(topologyName + " is successfully submitted");

    } catch (AlreadyAliveException aae) {
        System.out.println("Fail to submit " + topologyName + "\nError message: " + aae.get_msg());
    } catch (InvalidTopologyException ite) {
        System.out.println("Invalid topology for " + topologyName);
        ite.printStackTrace();
    } catch (TException te) {
        System.out.println("Texception for " + topologyName);
        te.printStackTrace();
    }
}

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From source file:com.avego.oauth.migration.OauthDataMigrator.java

/**
 * This migrates spring security oauth 2 token data in m6 form to 1.0.5 release form
 * @param args/*ww w.  jav a  2  s.c  o m*/
 * @throws Exception
 */
public static void main(String[] args) throws Exception {

    if (args.length < 3) {
        System.err.println("Usage <db_jdbc_url> <db_user> <db_pw>");
        System.err.println("Or <db_jdbc_url> <db_user> <db_pw>"
                + " <remove_refresh_tokens> <serialize_new_token_values> <oauth_access_token_table> <oauth_refresh_token_table>");
        System.exit(1);
    }

    Boolean removeRefreshTokens = Boolean.FALSE;
    if (args.length > 3) {
        removeRefreshTokens = Boolean.parseBoolean(args[3]);
    }
    Boolean serializeNewTokenValues = Boolean.FALSE;
    if (args.length > 4) {
        serializeNewTokenValues = Boolean.parseBoolean(args[4]);
    }

    Map<String, Object> params = new HashMap<String, Object>(3);
    params.put(JdbcOauthMigrationDao.JDBC_URL_KEY, args[0]);
    params.put(JdbcOauthMigrationDao.USER_KEY, args[1]);
    params.put(JdbcOauthMigrationDao.PASS_KEY, args[2]);
    params.put(REMOVE_REFRESH_TOKENS_PARAM, removeRefreshTokens);
    params.put(SERIALIZE_NEW_TOKEN_VALUES_PARAM, serializeNewTokenValues);

    if (args.length > 5) {
        params.put(JdbcOauthMigrationDao.ACCESS_TOKEN_TABLE, args[5]);
    }
    if (args.length > 6) {
        params.put(JdbcOauthMigrationDao.REFRESH_TOKEN_TABLE, args[6]);
    }
    OauthDataMigrator migrator = new OauthDataMigrator(params);
    migrator.migrateData();
}

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