Example usage for java.util Collection size

Introduction

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

Prototype

int size();

Source Link

Document

Returns the number of elements in this collection.

Usage

From source file:Main.java

public static <T, K> T copyTree(T node, Function<T, K> keyMapper, Function<T, Collection<T>> childMapper,
        Function<T, T> cloneMapper, Collection<K> toCopy) {
    if (toCopy == null)
        return null;

    T copy = null;//from w w w  .  ja  va  2s  .c om

    Collection<T> children = childMapper.apply(node);
    if (children != null && children.size() > 0) {
        for (T child : children) {
            T childCopy = copyTree(child, keyMapper, childMapper, cloneMapper, toCopy);
            if (childCopy != null) {
                if (copy == null)
                    copy = cloneMapper.apply(node);
                childMapper.apply(copy).add(childCopy);
            }
        }
    }

    if (copy == null && toCopy.contains(keyMapper.apply(node)))
        copy = cloneMapper.apply(node);

    return copy;
}

From source file:io.syndesis.model.ListResult.java

static <T> ListResult<T> of(Collection<T> items) {
    return new Builder<T>().items(items).totalCount(items.size()).build();
}

From source file:Main.java

public static int sizeOf(Collection collection) {
    if (isEmpty(collection)) {
        return 0;
    }/*from  w ww  .  j a va 2s  . co m*/
    return collection.size();
}

From source file:Main.java

public static int getLength(Collection<?> collection) {
    if (collection == null) {
        return 0;
    }/*www.  ja  v a 2s  .co  m*/

    return collection.size();
}

From source file:Main.java

/**
 * The resultant set is those elements in superSet which are not in the subSet
 *///from   ww w .ja va2s .  co m
public static <T> List<T> setComplement(Collection<T> superSet, Collection<T> subList) {
    ArrayList<T> complement = new ArrayList<T>(superSet.size());
    for (T obj : superSet) {
        if (!subList.contains(obj)) {
            complement.add(obj);
        }
    }
    return complement;
}

From source file:Main.java

public static <T> int size(Collection<T> col) {
    if (col == null) {
        return 0;
    } else {/*from   w w w.j  av a2 s .co m*/
        return col.size();
    }
}

From source file:Main.java

public static boolean isNotEmpty(Collection<Object> collection) {
    if (collection == null) {
        return false;
    }/* ww w .j  av  a 2 s  .co  m*/
    if (collection.size() == 0) {
        return false;
    }
    return true;
}

From source file:Main.java

public static long[] collectionToLongArray(Collection<Long> allKeys) {
    if (allKeys == null)
        return null;
    long[] values = new long[allKeys.size()];
    int count = 0;
    for (Long allKey : allKeys) {
        values[count++] = allKey.longValue();
    }//from  w  w  w.ja va2s . c  om
    return values;
}

From source file:Main.java

/** Returns a new array even if collection is empty */
public static <T> T[] toArray(Collection<T> c, Class klass) {
    return toArray(c, (T[]) Array.newInstance(klass, c.size()));
}

From source file:Main.java

/**
 * This//from  w w  w.  j  av a  2 s  .c  o  m
 * @param collection
 * @return
 */
public static String[] toStringArray(Collection<? extends Object> collection) {
    String[] strArray = new String[collection.size()];

    int index = 0;
    for (Object obj : collection) {
        if (obj == null) {
            strArray[index] = "null";
        } else {
            strArray[index] = obj.toString();
        }
        index++;
    }

    return strArray;
}