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:hu.ppke.itk.nlpg.purepos.common.Util.java

public static <E> boolean isNotEmpty(Collection<E> c) {
    return c != null && c.size() > 0;
}

From source file:imageClassify.Describe.java

private static List<String> convert(Collection<?> values) {
    List<String> list = Lists.newArrayListWithCapacity(values.size());
    for (Object value : values) {
        list.add(value.toString());//from www  .j  a  v  a 2s. c  o  m
    }
    return list;
}

From source file:Main.java

public static <T> T last(Collection<T> c) {
    if (isEmpty(c))
        return null;

    if (c instanceof List)
        return (T) ((List<T>) c).get(c.size() - 1);

    List<T> a = new ArrayList<T>(c);
    return a.get(a.size() - 1);
}

From source file:Main.java

/**
 * Copy the given Collection into a Class array.
 * The Collection must contain Class elements only.
 *
 * @param collection the Collection to copy
 * @return the Class array ({@code null} if the passed-in
 * Collection was {@code null})//from w  ww  . j  a va 2  s .co  m
 */
public static Class<?>[] toClassArray(Collection<Class<?>> collection) {
    if (collection == null) {
        return null;
    }
    return collection.toArray(new Class<?>[collection.size()]);
}

From source file:Main.java

/**
 * Removes duplicate objects from the Collection.
 * @param p_collection a Collection//from w  w  w .j  ava 2s.co m
 * @returns true if one or more duplicate objects were removed.
 */
public static boolean removeDuplicates(Collection p_collection) {
    if (p_collection == null) {
        return false;
    }
    HashSet set = new HashSet(p_collection.size());
    Iterator it = p_collection.iterator();
    while (it.hasNext()) {
        set.add(it.next());
    }
    if (set.size() != p_collection.size()) {
        p_collection.clear();
        p_collection.addAll(set);
        return true;
    }
    return false;
}

From source file:Main.java

public static <T> void nullFill(final Collection<T> coll, @Nonnegative final int size) {
    checkNotNull(coll);/*from   w w  w  .  ja  va2 s .  com*/
    checkArgument(size >= 0, "size is negative");
    while (coll.size() < size) {
        coll.add(null);
    }

}

From source file:Main.java

public static int[] toIntArray(Collection<Integer> list) {
    if (list == null || list.isEmpty()) {
        return EMPTY_INT_ARRAY;
    }/*ww w  .  j  a v  a2  s.  c om*/
    int[] result = new int[list.size()];
    int i = 0;
    for (Integer integer : list) {
        result[i++] = integer;
    }
    return result;
}

From source file:Main.java

/**
 * //from w w w. j ava  2s . com
 * @param collection
 * @return int[]
 */
public static boolean[] toBooleanArray(final Collection<Boolean> collection) {
    final boolean[] array = new boolean[collection == null ? 0 : collection.size()];

    if (collection != null) {
        int i = 0;

        for (Iterator<Boolean> iterator = collection.iterator(); iterator.hasNext();) {
            array[i++] = iterator.next().booleanValue();
        }
    }

    return array;
}

From source file:Main.java

/**
 * Converts a collection of Integer values to an int[] array.
 * @param values//ww w .jav a  2s .  c  om
 * @return null if the given collection is null, otherwise an array of the same size as the collection
 * @throws NullPointerException when an element of the collection is null
 */
public static int[] toIntArray(Collection<Integer> values) {
    if (values == null) {
        return null;
    }
    int i = 0;
    int[] result = new int[values.size()];
    for (Integer value : values) {
        result[i++] = value;
    }
    return result;
}

From source file:com.goncalomb.bukkit.bkglib.namemaps.EntityTypeMap.java

public static List<String> getNames(Collection<EntityType> types) {
    ArrayList<String> names = new ArrayList<String>(types.size());
    for (EntityType type : types) {
        names.add(getName(type));// w  w w .j ava  2 s  . c  o  m
    }
    return names;
}