Example usage for java.util Collection add

Introduction

In this page you can find the example usage for java.util Collection add.

Prototype

boolean add(E e);

Source Link

Document

Ensures that this collection contains the specified element (optional operation).

Usage

From source file:Main.java

public static final <E> void addToCollection(Collection<? super E> collection, E... elements) {
    for (E e : elements) {
        collection.add(e);
    }// w w w .j av  a  2s . co m
}

From source file:Main.java

/**
 * Adds an element to the collection unless the element is null.
 *
 * @param collection  the collection to add to, must not be null
 * @param object  the object to add, if null it will not be added
 * @return true if the collection changed
 * @throws NullPointerException if the collection is null
 * @since Commons Collections 3.2// w  w w . j  a  v  a 2 s .c om
 */
public static boolean addIgnoreNull(Collection collection, Object object) {
    return (object == null ? false : collection.add(object));
}

From source file:Main.java

public static <T> void addIfNotNull(Collection<T> c, T element) {
    if (null != c && null != element) {
        c.add(element);
    }/*from w  w  w  .  jav  a2s .c o  m*/
}

From source file:Main.java

private static <T> void iterableToCollection(Iterable<? extends T> c, Collection<T> list) {
    for (T element : c) {
        list.add(element);
    }//from w ww . j a v  a2  s  .co  m
}

From source file:Main.java

public static <C extends Collection<T>, T> Collection<T> fromArray(T[] array, Class<C> clazz) {
    try {//from   w  w w.ja  v  a2  s  . c o  m
        Collection<T> collection = clazz.newInstance();
        for (T o : array) {
            collection.add(o);
        }
        return collection;
    } catch (Exception e) {
        return null;
    }
}

From source file:Main.java

/**
 * Add all elements from the supplied array to the specified collection.
 *
 * @param collection The collection to add to.
 * @param array The elements to add./* w  w w  .jav a 2s  . c o m*/
 */
@SuppressWarnings({ "rawtypes", "unchecked" })
public static void addAll(Collection collection, Object[] array) {
    for (Object obj : array) {
        collection.add(obj);
    }
}

From source file:Main.java

/**
 * Similar to Collection.add() but only allows non-null elements.
 *
 * @return <code>true</code> if this collection changed as a result of the call
 *///w ww  . ja va  2 s .  com
public static <T> boolean addSafe(final Collection<T> collection, T element) {
    if (element != null) {
        return collection.add(element);
    } else {
        return false;
    }
}

From source file:Main.java

private static void findNodesNamed(Node node, String lookForName, Collection<Node> ret) {
    if (node.getNodeName().equals(lookForName)) {
        ret.add(node);
    } else {//from   ww  w  .  j  a va2  s .  c om
        NodeList list = node.getChildNodes();
        for (int i = 0; i < list.getLength(); ++i) {
            findNodesNamed(list.item(i), lookForName, ret);
        }
    }
}

From source file:Main.java

public static <O, P extends O> boolean safeAddAll(Collection<O> c, P[] items) {
    try {//from   w w w.  j av a  2 s . com
        for (O item : items) {
            c.add(item);
        }

        return true;
    } catch (Throwable ex) {
        return false;
    }
}

From source file:Main.java

public static Collection<Thread> getThreads(int count, Supplier<Thread> threadSupplier) {
    Collection<Thread> threads = new ArrayList<>(count);
    for (int i = 0; i < count; i++) {
        threads.add(threadSupplier.get());
    }/*from ww  w. j  a  va  2 s .  c  o  m*/
    return threads;
}