Example usage for java.util Map keySet

Introduction

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

Prototype

Set<K> keySet();

Source Link

Document

Returns a Set view of the keys contained in this map.

Usage

From source file:Main.java

public static void main(String[] args) throws Exception {
    URL url = new URL("http://www.google.com/index.html");
    URLConnection connection = url.openConnection();

    Map responseMap = connection.getHeaderFields();
    for (Iterator iterator = responseMap.keySet().iterator(); iterator.hasNext();) {
        String key = (String) iterator.next();
        System.out.println(key + " = ");

        List values = (List) responseMap.get(key);
        for (int i = 0; i < values.size(); i++) {
            Object o = values.get(i);
            System.out.println(o + ", ");
        }//from w ww . ja  v  a  2 s. c o  m
    }
}

From source file:MainClass.java

public static void main(String[] args) throws Exception {
    Document document = new Document(new Rectangle(100, 100));
    PdfWriter writer = PdfWriter.getInstance(document, new FileOutputStream("sun_tutorial_with_text.pdf"));
    document.open();//from w  ww. j a  va2s  .  c  o m
    PdfContentByte cb = writer.getDirectContent();
    PdfTemplate tp = cb.createTemplate(100, 100);
    DefaultFontMapper mapper = new DefaultFontMapper();
    mapper.insertDirectory("c:/windows/fonts");
    String name;
    Map map = mapper.getMapper();
    for (Iterator i = map.keySet().iterator(); i.hasNext();) {
        name = (String) i.next();
        System.out.println(name + ": " + ((DefaultFontMapper.BaseFontParameters) map.get(name)).fontName);
    }
    Graphics2D g2 = tp.createGraphics(100, 100, mapper);
    g2.setColor(Color.black);
    java.awt.Font thisFont = new java.awt.Font("Garamond", java.awt.Font.PLAIN, 18);
    g2.setFont(thisFont);
    String pear = "Pear";
    FontMetrics metrics = g2.getFontMetrics();
    int width = metrics.stringWidth(pear);
    g2.drawString(pear, (100 - width) / 2, 20);
    g2.dispose();
    cb.addTemplate(tp, 0, 0);
    document.close();
}

From source file:Main.java

public static void main(String[] argv) {
    List collection = new ArrayList();

    // For a set or list
    for (Iterator it = collection.iterator(); it.hasNext();) {
        Object element = it.next();
    }/*from www. j a  v  a 2 s. co m*/
    Map map = new HashMap();
    // For keys of a map
    for (Iterator it = map.keySet().iterator(); it.hasNext();) {
        Object key = it.next();
    }

    // For values of a map
    for (Iterator it = map.values().iterator(); it.hasNext();) {
        Object value = it.next();
    }

    // For both the keys and values of a map
    for (Iterator it = map.entrySet().iterator(); it.hasNext();) {
        Map.Entry entry = (Map.Entry) it.next();
        Object key = entry.getKey();
        Object value = entry.getValue();
    }
}

From source file:com.joshlong.examples.data.counter.Main.java

public static void main(String[] args) throws Throwable {
    ApplicationContext ac = new ClassPathXmlApplicationContext("classpath:/counter.xml");
    Map<String, Counter> counters = ac.getBeansOfType(Counter.class);
    for (String beanName : counters.keySet())
        exercise(beanName, counters.get(beanName));
}

From source file:com.apress.prospringintegration.jdbc.JdbcGateway.java

public static void main(String[] args) throws Exception {
    ApplicationContext context = new ClassPathXmlApplicationContext("/spring/jdbc/jdbc-gateway-context.xml");

    MessageChannel input = context.getBean("input", MessageChannel.class);
    PollableChannel output = context.getBean("output", PollableChannel.class);

    Map<String, Object> rowMessage = new HashMap<String, Object>();

    rowMessage.put("id", 3);
    rowMessage.put("firstname", "Mr");
    rowMessage.put("lastname", "Bill");
    rowMessage.put("status", 0);

    Message<Map<String, Object>> message = MessageBuilder.withPayload(rowMessage).build();
    input.send(message);/*ww w.  j a  v  a 2  s. c o  m*/

    Message<?> reply = output.receive();

    System.out.println("Reply message: " + reply);

    Map<String, Object> rowMap = (Map<String, Object>) reply.getPayload();

    for (String column : rowMap.keySet()) {
        System.out.println("column: " + column + " value: " + rowMap.get(column));
    }
}

From source file:Main.java

public static void main(String[] argv) throws Exception {
    Map weakMap = new WeakHashMap();
    Object keyObject = "";
    Object valueObject = "";
    weakMap.put(keyObject, valueObject);

    Iterator it = weakMap.keySet().iterator();
    while (it.hasNext()) {
        Object key = it.next();/* w  w  w . j ava2 s .c  o m*/
    }
}

From source file:edu.sjsu.cmpe275.lab2.model.HibernateUtil.java

public static void main(final String[] args) throws Exception {
    Session session = getSessionFactory().openSession();

    try {//from  w w w .  ja v  a  2  s  . com
        System.out.println("querying all the managed entities...");
        final Map metadataMap = session.getSessionFactory().getAllClassMetadata();
        for (Object key : metadataMap.keySet()) {
            final ClassMetadata classMetadata = (ClassMetadata) metadataMap.get(key);
            final String entityName = classMetadata.getEntityName();
            final Query query = session.createQuery("from " + entityName);
            System.out.println("executing: " + query.getQueryString());
            for (Object o : query.list()) {
                System.out.println("  " + o);
            }
        }
    } finally {
        session.close();
    }
}

From source file:DiameterMap.java

public static void main(String args[]) {
    String names[] = { "Mercury", "Venus", "Earth", "Mars", "Jupiter", "Saturn", "Uranus", "Neptune", "Pluto" };
    float diameters[] = { 4800f, 12103.6f, 12756.3f, 6794f, 142984f, 120536f, 51118f, 49532f, 2274f };
    Map map = new TreeMap();
    for (int i = 0, n = names.length; i < n; i++) {
        map.put(names[i], new Float(diameters[i]));
    }/*  w  w  w. ja  va2 s.  c  o  m*/
    Iterator it = map.keySet().iterator();
    Object obj;
    while (it.hasNext()) {
        obj = it.next();
        System.out.println(obj + ": " + map.get(obj));
    }
}

From source file:gov.nih.nci.cabio.portal.portlet.canned.CannedObjectConfig.java

/**
 * Test harness.//w w  w.ja  v  a 2  s .co  m
 */
public static final void main(String[] args) throws Exception {

    CannedObjectConfig c = new CannedObjectConfig();
    Map<String, ClassObject> classes = c.getClasses();
    for (String className : classes.keySet()) {
        ClassObject config = classes.get(className);
        System.out.println(className + ": " + config.getLabel());
        for (LabeledObject attr : config.getAttributesForRole("SUMMARY")) {
            System.out.println("\t" + attr.getName() + ": " + attr.getLabel());
        }
    }
}

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");
    map.put(null, null);/* w w  w  . j  a  v a 2  s .  com*/

    Set set = map.keySet();

    Iterator iter = set.iterator();

    while (iter.hasNext()) {
        System.out.println(iter.next());
    }
}