Example usage for java.util Iterator next

Introduction

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

Prototype

E next();

Source Link

Document

Returns the next element in the iteration.

Usage

From source file:Main.java

/**
 * Get the first element of a an {@link Iterable} in iteration order, or null if empty.
 *
 * @param <T> the type//from ww w  .ja v  a2  s  .c  om
 * @param iterable the thing to get something from.
 * @return the first thing the iterator spits out. May
 */
public static <T> T first(@Nonnull final Iterable<? extends T> iterable) {
    final Iterator<? extends T> iterator = iterable.iterator();
    return (iterator.hasNext()) ? iterator.next() : null;
}

From source file:Main.java

public static <T> T getFirstNonNull(Collection<T> c) {
    T ret = null;//from   ww w.j  av a2  s  .  c o m
    Iterator<T> it = c.iterator();
    while (it.hasNext() && ret == null) {
        T t = it.next();
        if (t != null)
            ret = t;
    }
    return ret;
}

From source file:Main.java

public static <T> T min(Iterator<? extends T> iterator, Comparator<T> comparator) {
    T next, candidate = iterator.next();
    while (iterator.hasNext()) {
        if (comparator.compare(next = iterator.next(), candidate) < 0) {
            candidate = next;//from   w w  w.j a  v a  2 s.c om
        }
    }
    return candidate;
}

From source file:Main.java

public static <T> T nth(Iterable<T> coll, int which) {
    Iterator<T> it = coll.iterator();
    T ret = null;//from  www. j  a v  a2 s .  c o m
    while (which-- >= 0)
        ret = it.next();
    return ret;
}

From source file:Main.java

private static String reconstruireDonnee(Vector<Integer> vectBit) {
    String donnee = "";

    //On ajoute le nouvel encodage dans le String "ligne" vide ci-haut
    Iterator<Integer> it = vectBit.iterator();
    while (it.hasNext()) {
        donnee += it.next();
    }//from  w  ww  .  j a v a2 s . co  m

    return donnee;
}

From source file:Main.java

public static <T> List<T> intersection(Collection<T> a, Collection<T> b) {
    ArrayList list = new ArrayList();
    Iterator i$ = a.iterator();

    while (i$.hasNext()) {
        Object element = i$.next();
        if (b.contains(element)) {
            list.add(element);// w w  w.  j a va 2 s .c o  m
        }
    }

    return list;
}

From source file:Main.java

/**
 * Answer a set containing all elements that are both in source and in query
 * Delete these elements from source Creation date: (13.10.2002 16:23:00)
 * // ww w  .j  a  v  a 2 s  . c  o  m
 * @return java.util.Set
 * @param source
 *            java.util.Set
 * @param elements
 *            java.util.Collection
 */
public static Set extractFrom(Set source, Collection query) {
    Set answer = new HashSet();
    Iterator i = query.iterator();
    while (i.hasNext()) {
        Object o = i.next();
        if (source.remove(o)) {
            answer.add(o);
        }
    }
    return answer;
}

From source file:Main.java

public static String toString(Collection<?> list, String split) {
    if (list == null) {
        return null;
    }/*from  w  w  w.  jav a  2 s  . c o  m*/
    StringBuffer rs = new StringBuffer();
    Iterator<?> it = list.iterator();
    while (it.hasNext()) {
        rs.append(it.next());
        if (it.hasNext()) {
            rs.append(split);
        }
    }
    return rs.toString();
}

From source file:Main.java

public static Object getFirstObject(Collection<?> collection) {
    Iterator<?> iterator = collection.iterator();

    if (iterator.hasNext()) {
        return iterator.next();
    } else {//  ww  w . j av a  2  s . c  o  m
        return null;
    }
}

From source file:Main.java

public static boolean containsIgnoreCase(List<String> l, String s) {
    Iterator<String> it = l.iterator();
    while (it.hasNext()) {
        if (it.next().equalsIgnoreCase(s))
            return true;
    }//from   ww  w.  j a v  a2  s.  c o  m
    return false;
}