Example usage for java.util Map size

Introduction

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

Prototype

int size();

Source Link

Document

Returns the number of key-value mappings in this map.

Usage

From source file:Main.java

public static final void main(String[] args) {
    Map<String, String> map = new HashMap<>();
    map.put("one", "a");
    System.out.println("Size = " + map.size());
    map.put(null, "b");
    System.out.println("Size = " + map.size());
    System.out.println("map.get(null) = " + map.get(null));
}

From source file:Freq.java

public static void main(String args[]) {
    Map m = new TreeMap();

    m.put("a Key", "a Value");
    m.put("Java2s", "www.java2s.com");

    System.out.println(m.size() + " keys detected:");
    System.out.println(m);//  www.  ja v  a 2  s . co m
}

From source file:MainClass.java

public static void main(String[] a) {

    Map map = new HashMap();
    map.put("key1", "value1");
    map.put("key2", "value2");
    map.put("key3", "value3");

    System.out.println(map.size());
}

From source file:de.unisb.cs.st.javalanche.mutation.util.FilePerformanceTest.java

public static void main(String[] args) throws IOException {
    int limit = 1000;
    int total = 0;
    StopWatch stp = new StopWatch();
    stp.start();//w w w  .  jav a2s  .  co  m
    File dir = new File("mutation-files/tmp");
    dir.mkdir();
    for (int i = 0; i < limit; i++) {
        Map<String, Set<Integer>> map = getMap();
        File tempFile = new File(dir, "test-" + i + ".ser");
        if (!tempFile.exists()) {
            SerializeIo.serializeToFile(map, tempFile);
        } else {
            Map<String, Set<Integer>> deserialize = SerializeIo.get(tempFile);
            total += deserialize.size();
        }
    }
    System.out.println(
            "Handling " + limit + " files took " + DurationFormatUtils.formatDurationHMS(stp.getTime()));
}

From source file:com.khartec.waltz.jobs.DatabaseHarness.java

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

    AnnotationConfigApplicationContext ctx = new AnnotationConfigApplicationContext(DIConfiguration.class);

    DatabaseInformationDao databaseDao = ctx.getBean(DatabaseInformationDao.class);
    DSLContext dsl = ctx.getBean(DSLContext.class);

    List<DatabaseInformation> dbs = databaseDao.findByApplicationId(801L);
    System.out.println(dbs.size());

    SelectConditionStep<Record1<Long>> idSelector = dsl.select(APPLICATION.ID).from(APPLICATION)
            .where(APPLICATION.ID.in(801L, 802L, 803L));

    Map<Long, List<DatabaseInformation>> moreDbs = databaseDao.findByAppSelector(idSelector);
    System.out.println(moreDbs.size());
    System.out.println(moreDbs.values().size());

}

From source file:MainClass.java

public static void main(String args[]) {

    String[] names = { "A", "J", "B", "E", "P" };
    String[] ids = { "1", "2", "9", "8", "7" };

    Map<String, String> IDMap = new HashMap<String, String>();

    for (int i = 0; i < names.length; i++)
        IDMap.put(ids[i], names[i]);/* w ww .j  a  v  a2 s  . c  o m*/

    System.out.println(IDMap.size() + " Students entered: ");
    System.out.println(IDMap);

}

From source file:Main.java

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

    System.out.println(map.size());
}

From source file:io.jenkins.backend.jiraldapsyncer.LdapClient.java

public static void main(String[] args) {
    ServiceLocator locator = new ServiceLocator();
    LdapClient ldapClient = (LdapClient) locator.lookupService(LdapClient.ROLE);
    Map<String, RemoteUser> ldapUsers = ldapClient.getAllUsers();
    LOG.info("LDAP directory contains " + ldapUsers.size() + " users");
}

From source file:Main.java

public static void main(String[] argv) throws Exception {
    Map<String, Integer> map = new HashMap<String, Integer>();
    map = new TreeMap();

    map.put("a", new Integer(1));
    map.put("b", new Integer(2));
    map.put("c", new Integer(3));

    int size = map.size(); // 2

    Object oldValue = map.put("a", new Integer(9)); // 1

    oldValue = map.remove("c"); // 3

    Iterator it = map.keySet().iterator();
    while (it.hasNext()) {
        Object key = it.next();//from w ww  .  java  2  s. co m
    }

    it = map.values().iterator();
    while (it.hasNext()) {
        Object value = it.next();
    }
}

From source file:com.jgoetsch.eventtrader.EventTraderSpringLauncher.java

public static void main(String[] args) {
    if (args.length < 1) {
        System.out.println("Usage: " + EventTraderSpringLauncher.class.getSimpleName() + " <files>...");
        System.out.println("       files - List of paths to spring bean definition xml files.");
        System.out.println("               Each object defined that implements Runnable will be executed");
        System.out.println("               in its own thread.");
    } else {//from  w  w w .  j  a  v a 2 s .  c  o m
        AbstractApplicationContext context = new ClassPathXmlApplicationContext(args);

        // auto register growl notifications after all GrowlNotification objects have been instantiated
        // if it is found on the classpath
        try {
            Class.forName("com.jgoetsch.eventtrader.processor.GrowlNotification").getMethod("autoRegister")
                    .invoke(null);
        } catch (Exception e) {
            log.warn("Growl not found, cannot autoRegister notifications: {}", e.getMessage());
        }

        Map<String, Runnable> runnables = BeanFactoryUtils.beansOfTypeIncludingAncestors(context,
                Runnable.class);
        List<Thread> threads = new ArrayList<Thread>(runnables.size());
        for (final Map.Entry<String, Runnable> runner : runnables.entrySet()) {
            final Thread th = new Thread(runner.getValue(), runner.getKey());
            threads.add(th);
            th.start();
        }

        // close spring context on JVM shutdown
        // this causes all @PreDestroy methods in the runnables to be called to allow for
        // them to shutdown gracefully
        context.registerShutdownHook();

        // wait for launched threads to finish before cleaning up beans
        for (Thread th : threads) {
            try {
                th.join();
            } catch (InterruptedException e) {
            }
        }
    }
}