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;
    }//from  w w w.j a v  a  2s.co m
    return false;
}

From source file:Main.java

/**
 * Check if the collection is empty//w w w  .j av  a  2  s  .  c om
 * 
 * @param c The collection to check.
 * @return False if the collection is not null and contains at least one element. True if the collection
 * is null, or if the collection is empty.
 */
public static boolean isEmpty(Collection<?> c) {
    if (c != null && c.size() > 0) {
        return false;
    }
    return true;
}

From source file:Main.java

/**
 * This method to check if Collection is Empty
 * @param Collection list/*w  w  w.  ja  v  a2 s .  co  m*/
 * @return boolean
 */
public static boolean isEmptyList(Collection list) {
    if (list == null || list.size() == 0) {
        return true;
    }
    return false;
}

From source file:Main.java

public static <E> int sizeOf(Collection<E> c) {
    return isEmpty(c) ? 0 : c.size();
}

From source file:Main.java

public static <T> T getSole(Collection<T> l) {
    return l.size() == 1 ? l.iterator().next() : null;
}

From source file:Main.java

public static boolean isEmpty(final Collection<?> c) {
    return (c == null) || (c.size() == 0);
}

From source file:Main.java

/**
 *
 * @param <T>//  w  w w .ja  v a  2  s.c o  m
 * @param collection
 * @return first element or null if empty
 */
public static <T> T getFirstElement(Collection<? extends T> collection) {
    return collection.size() > 0 ? collection.iterator().next() : null;
}

From source file:Main.java

public static boolean notEmpty(Collection collection) {
    return collection != null && collection.size() > 0;
}

From source file:Main.java

public static boolean isNullOrEmpty(Collection<?> list) {
    return list == null || list.size() == 0;
}

From source file:Main.java

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