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 boolean isEmpty(Collection<?> c) {
    if (c == null || c.size() == 0) {
        return true;
    } else {//from   w w w . j  a v a  2 s  .  co m
        return false;
    }
}

From source file:Main.java

public static boolean isCollectionNotEmpty(Collection<?> collection) {
    if (collection != null && collection.size() > 0) {
        return true;
    }//from ww w  . ja  v  a 2s.  co  m
    return false;
}

From source file:Main.java

public static int size(Collection<?> collection) {
    return collection == null ? 0 : collection.size();
}

From source file:Main.java

public static boolean isListNotEmpty(Collection<?> collection) {
    if (collection != null && collection.size() > 0) {
        return true;
    }/* w  ww.java 2s. co m*/
    return false;
}

From source file:Main.java

/** Convert a Collection of Strings to a plain array String[]. */
public static String[] unboxStrings(Collection<String> coll) {
    return coll.toArray(new String[coll.size()]);
}

From source file:Main.java

/**
 * Returns the size of the specified collection or {@code 0} if the
 * collection is {@code null}.//from w w w.j av  a  2 s  .co m
 *
 * @param c
 *            the collection to check
 * @return the size of the specified collection or {@code 0} if the
 *         collection is {@code null}.
 * @since 1.2
 */
public static int size(Collection c) {
    return c != null ? c.size() : 0;
}

From source file:Main.java

public static boolean isEmpty(Collection collection) {
    return null == collection || 0 == collection.size();
}

From source file:Main.java

public static boolean isEmpty(Collection collection) {
    return collection == null || collection.size() == 0;
}

From source file:Main.java

public static boolean isEmpty(Collection collection) {
    return (collection == null || collection.size() == 0);
}

From source file:Main.java

public static <T> T getSoleElement(final Collection<T> items) {
    if (items.size() != 1)
        throw new IllegalArgumentException(
                String.format("Expected a single element in %s, but found %s.", items, items.size()));
    return items.iterator().next();
}