Example usage for java.util Collection isEmpty

Introduction

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

Prototype

boolean isEmpty();

Source Link

Document

Returns true if this collection contains no elements.

Usage

From source file:Main.java

public static boolean isCollectionEmpty(Collection<?> collection) {
    return collection == null || collection.isEmpty();
}

From source file:Main.java

public static <T> boolean isEmpty(final Collection<T> collection) {
    return collection == null || collection.isEmpty();
}

From source file:Main.java

/**
 * Null-safe check if the specified collection is empty.
 * <p>/*from   w w w. ja v  a 2s  .com*/
 * Null returns true.
 * 
 * @param coll
 *            the collection to check, may be null
 * @return true if empty or null
 * @since Commons Collections 3.2
 */
public static <E> boolean isEmpty(Collection<E> coll) {
    return (coll == null || coll.isEmpty());
}

From source file:Main.java

/**
 * Remove all object from collection to other collection
 * @param <T>/* w w  w .  j  av a2  s.c o  m*/
 * @param from source collection
 * @param to target collection
 */
public static <T> void moveAllObject(Collection<T> from, Collection<T> to) {
    if (!from.isEmpty()) {
        to.addAll(from);
        from.clear();
    }
}

From source file:Main.java

public static boolean isEmpty(Collection<?> collection) {
    return collection == null || collection.isEmpty();

}

From source file:Main.java

/**
 * Checks if an input collection contains a given value.
 *
 * @param <A> Key type//from w  w  w.ja  v a 2s . com
 * @param collection Input collection
 * @param value Value to search
 * @return {@code true} if {@code value} is present in {@code collection}, and {@code false} otherwise. If {@code collection} is empty, it will return {@code false}
 */
public static <A> boolean contains(Collection<A> collection, A value) {
    if (collection.isEmpty())
        return false;

    for (A item : collection)
        if (item == value)
            return true;

    return false;
}

From source file:Main.java

public static <E> boolean isEmpty(Collection<E> collection) {
    if (collection == null || collection.isEmpty()) {
        return true;
    }/*ww  w. ja  va2 s.co  m*/
    Iterator<E> it = collection.iterator();
    while (it.hasNext()) {
        E type = (E) it.next();
        if (type != null) {
            return false;
        }
    }
    return true;
}

From source file:Main.java

/**
 * Implementation of the OCL// w  ww  .jav a 2 s  . c  om
 * <ul>
 * <li><tt>OrderedSet::lset() : T</tt></li>
 * <li><tt>Sequence::lset() : T</tt></li>
 * </ul>
 * operations.
 * 
 * @param self the source collection
 * @return the last object in the source collection
 */
public static <E> E last(Collection<E> self) {
    if (self.isEmpty()) {
        return null; // undefined
    }
    E result = null;
    for (E next : self) {
        result = next;
    }
    return result;
}

From source file:Main.java

public static boolean isEmpty(Collection<? extends Object> collection) {
    return collection == null || collection.isEmpty();
}

From source file:Main.java

public static <T> boolean isEmpty(Collection<T> collection) {
    return collection == null || collection.isEmpty();
}