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) {

    TreeSet<Integer> treeadd = new TreeSet<Integer>();

    treeadd.add(1);/*from w w w  . j  a  v a 2  s .co  m*/
    treeadd.add(3);
    treeadd.add(17);
    treeadd.add(2);

    System.out.println("Last element is: " + treeadd.pollLast());

    Iterator<Integer> iterator = treeadd.iterator();

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

From source file:Main.java

public static void main(String[] args) {

    TreeSet<Integer> treeadd = new TreeSet<Integer>();

    treeadd.add(1);//from   w  ww .  j a  v a 2s .  c o m
    treeadd.add(3);
    treeadd.add(17);
    treeadd.add(2);

    System.out.println("First element is: " + treeadd.pollFirst());

    Iterator<Integer> iterator = treeadd.iterator();

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

From source file:DynaBeansExampleV2.java

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

    Connection conn = getConnection();
    PreparedStatement ps = conn//ww  w  .  j a  va  2 s.c  om
            .prepareStatement("SELECT * from movie, person " + "WHERE movie.director = person.Id");
    ResultSet rs = ps.executeQuery();

    ResultSetDynaClass rsdc = new ResultSetDynaClass(rs);

    Iterator itr = rsdc.iterator();
    while (itr.hasNext()) {
        DynaBean bean = (DynaBean) itr.next();
        System.err.println(bean.get("title"));
    }

    conn.close();
}

From source file:Main.java

public static void main(String[] args) {
    TreeSet<Integer> tree = new TreeSet<Integer>();

    tree.add(12);/* w  w  w. j  a v a  2  s  . c om*/
    tree.add(13);
    tree.add(14);

    // cloning tree into clinetree
    TreeSet<Integer> clonetree = (TreeSet) tree.clone();

    // creating iterator
    Iterator<Integer> iterator = clonetree.iterator();

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

From source file:Main.java

public static void main(String[] args) {

    TreeSet<Integer> treeadd = new TreeSet<Integer>();

    treeadd.add(12);/*from  w ww. j ava  2 s .  c o  m*/
    treeadd.add(13);
    treeadd.add(14);
    treeadd.add(15);

    Iterator<Integer> iterator = treeadd.iterator();

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

    treeadd.clear();
    System.out.println(treeadd.size());
}

From source file:MainClass.java

public static void main(String args[]) throws Exception {
    Hashtable hash = new Hashtable(89);
    hash.put("one", "two");
    hash.put("two", "three");
    hash.put("three", "four");
    hash.put("four", "five");
    System.out.println(hash);// w ww  .  j  a  va 2 s  .com
    System.out.println(hash.size());
    Enumeration e = hash.keys();
    while (e.hasMoreElements()) {
        String key = (String) e.nextElement();
        System.out.println(key + " : " + hash.get(key));
    }
    Set set = hash.entrySet();
    Iterator it = set.iterator();
    while (it.hasNext()) {
        Map.Entry entry = (Map.Entry) it.next();
        System.out.println(entry.getKey() + " : " + entry.getValue());
    }
}

From source file:EnumerationIterator1.java

public static void main(String args[]) {
    String elements[] = { "Java", "Source", "and", "Support", "." };
    Vector v = new Vector(Arrays.asList(elements));
    Enumeration e = v.elements();
    Iterator itor = EnumerationIterator1.iterator(e);
    while (itor.hasNext()) {
        System.out.println(itor.next());
    }//w  w  w . j a v a  2s  .c o  m
}

From source file:MainClass.java

public static void main(String[] args) throws Exception {
    Preferences prefs = Preferences.userNodeForPackage(MainClass.class);
    prefs.put("key1", "value1");
    prefs.put("key2", "value2");
    prefs.putInt("intValue", 4);
    prefs.putBoolean("booleanValue", true);
    int usageCount = prefs.getInt("intValue", 0);
    usageCount++;//from  w w w.  jav  a2s  .c o  m
    prefs.putInt("UsageCount", usageCount);
    Iterator it = Arrays.asList(prefs.keys()).iterator();
    while (it.hasNext()) {
        String key = it.next().toString();
        System.out.println(key + ": " + prefs.get(key, null));
    }
    System.out.println(prefs.getInt("booleanValue", 0));
}

From source file:Main.java

public static void main(String[] args) {
    Map<String, Charset> charsets = Charset.availableCharsets();
    Iterator<Charset> iterator = charsets.values().iterator();
    while (iterator.hasNext()) {
        Charset cs = (Charset) iterator.next();
        System.out.println(cs.displayName());
        if (cs.isRegistered()) {
            System.out.print(" (registered): ");
        } else {//w ww  . j a  v a  2 s.c  o  m
            System.out.print(" (unregistered): ");
        }
    }
}

From source file:Main.java

public static void main(String[] args) throws Exception {
    Preferences prefs = Preferences.userNodeForPackage(Main.class);
    prefs.put("key1", "value1");
    prefs.put("key2", "value2");
    prefs.putInt("intValue", 4);
    prefs.putBoolean("booleanValue", true);
    int usageCount = prefs.getInt("intValue", 0);
    usageCount++;/*from w  w  w.ja va2 s.co m*/
    prefs.putInt("UsageCount", usageCount);
    Iterator it = Arrays.asList(prefs.keys()).iterator();
    while (it.hasNext()) {
        String key = it.next().toString();
        System.out.println(key + ": " + prefs.get(key, null));
    }
    System.out.println(prefs.getInt("booleanValue", 0));
}