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:DynaBeansExampleV3.java

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

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

    RowSetDynaClass rsdc = new RowSetDynaClass(rs);

    conn.close();

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

}

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 a v  a  2  s.  c o 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());
        }
    }
}

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  2 s . com
    treeadd.add(2);
    treeadd.add(3);
    treeadd.add(4);
    treeadd.add(5);
    treeadd.add(6);
    treeadd.add(7);
    treeadd.add(8);

    TreeSet<Integer> treetailsetincl = (TreeSet<Integer>) treeadd.tailSet(5, true);

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

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

From source file:ArrayListGenericDemo.java

public static void main(String[] args) {
    ArrayList<String> data = new ArrayList<String>();
    data.add("hello");
    data.add("goodbye");

    // data.add(new Date()); This won't compile!

    Iterator<String> it = data.iterator();
    while (it.hasNext()) {
        String s = it.next();//from   www. j  a  va2  s  .  c o m
        System.out.println(s);
    }
}

From source file:MyComparator.java

public static void main(String[] args) {
    TreeMap tm = new TreeMap();
    tm.put(1, new Double(344.34));
    tm.put(0, new Double(123.22));
    tm.put(4, new Double(138.00));
    tm.put(2, new Double(919.22));
    tm.put(3, new Double(-119.08));

    List<Map.Entry> valueList = new ArrayList(tm.entrySet());
    Collections.sort(valueList, new MyComparator());

    Iterator<Map.Entry> iterator = valueList.iterator();
    while (iterator.hasNext()) {
        Map.Entry entry = iterator.next();
        System.out.println("Value: " + entry.getValue());
    }/*w ww  .  j  av a 2 s. c  o  m*/
}

From source file:Main.java

public static void main(String[] args) {
    Date d1 = new Date();
    Calendar cal = Calendar.getInstance();
    cal.add(Calendar.DATE, 22);//ww  w.  j  a  v  a2  s .c  o  m
    Date d2 = cal.getTime();

    Iterator<Date> i = new DateIterator(d1, d2);
    while (i.hasNext()) {
        Date date = i.next();
        System.out.println(date);
    }
}

From source file:MainClass.java

public static void main(String args[]) {
    Hashtable<String, Double> balance = new Hashtable<String, Double>();

    String str;//www. ja va2s  .c  om
    double bal;

    balance.put("A", 4.34);
    balance.put("B", 3.22);
    balance.put("C", 8.00);
    balance.put("D", 9.22);
    balance.put("E", -9.08);

    Set<String> set = balance.keySet();

    Iterator<String> itr = set.iterator();
    while (itr.hasNext()) {
        str = itr.next();
        System.out.println(str + ": " + balance.get(str));
    }

    System.out.println();

    bal = balance.get("A");
    balance.put("A", bal + 1000);
    System.out.println("A's new balance: " + balance.get("A"));
}

From source file:Main.java

public static final void main(String[] args) {
    Map<String, String> m = new HashMap<>();
    m.put("a", "alpha");
    m.put("b", "beta");

    Iterator<Map.Entry<String, String>> it = m.entrySet().iterator();
    while (it.hasNext()) {
        Map.Entry<String, String> entry = it.next();
        if (entry.getKey() == "b") {
            entry.setValue("new Value");
        }/*from  w w  w . j a v a 2s . c  om*/
    }
    it = m.entrySet().iterator();
    while (it.hasNext()) {
        Map.Entry<String, String> entry = it.next();
        System.out.println("key = " + entry.getKey() + ", value = " + entry.getValue());
    }
}

From source file:IteratorDemo.java

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

    al.add("C");/* w  ww . j  a  va  2  s . com*/
    al.add("A");
    al.add("E");
    al.add("B");
    al.add("D");
    al.add("F");

    Iterator<String> itr = al.iterator();
    while (itr.hasNext()) {
        String element = itr.next();
        System.out.print(element + " ");
    }

    ListIterator<String> litr = al.listIterator();
    while (litr.hasNext()) {
        String element = litr.next();
        litr.set(element + "+");
    }

    itr = al.iterator();
    while (itr.hasNext()) {
        String element = itr.next();
        System.out.print(element + " ");
    }

    while (litr.hasPrevious()) {
        String element = litr.previous();
        System.out.print(element + " ");
    }
}

From source file:de.rwhq.btree.run.PrintTree.java

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

    final File f = new File("/tmp/indexha");
    if (!f.exists())
        throw new IllegalArgumentException("File does not exist");

    final ResourceManager resourceManager = new ResourceManagerBuilder().file(f).build();
    final BTree<Integer, String> tree = BTree.create(resourceManager, IntegerSerializer.INSTANCE,
            FixedStringSerializer.INSTANCE_1000, IntegerComparator.INSTANCE);

    final Iterator<String> it = tree.getIterator();
    while (it.hasNext()) {
        System.out.println(it.next());
    }//  w  w  w  .  j  a v a  2 s . co  m
}