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 emptyOrNull(Collection<?> values) {
    return values == null || values.isEmpty();
}

From source file:Main.java

/**
 * Check if the given Collection is null or empty
 * /*w w  w .  j a  va 2 s  .  com*/
 * @param col
 * @return true if it is empty or null, otherwise false
 */
public static boolean isEmpty(Collection<?> col) {
    return (col == null) || col.isEmpty();
}

From source file:Main.java

public static boolean isNotEmpty(Collection<?> collection) {
    return (collection != null && !collection.isEmpty());
}

From source file:Main.java

public static boolean notEmptyAndNull(Collection<?> values) {
    return values != null && !values.isEmpty();
}

From source file:Main.java

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

From source file:Main.java

public static <T, C extends Collection<T>> List<T> merge(Collection<C> splits) {
    if (splits == null || splits.isEmpty()) {
        return Collections.emptyList();
    }//from   w ww  . j  a  va  2  s.c  o  m
    List<T> list = new ArrayList<>();
    for (Collection<T> split : splits) {
        list.addAll(split);
    }
    return list;
}

From source file:Main.java

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

From source file:Main.java

/**
 * Return the first element of the collection.
 *
 * @param collection The collection./*from   www . j av a  2s . co  m*/
 * @param <T>        The objects stored in the collection.
 *
 * @return The first element of the collection or null if the collection is empty.
 */
public static <T> T first(Collection<T> collection) {
    if (collection.isEmpty()) {
        return null;
    }

    return collection.iterator().next();
}

From source file:Main.java

public static <V> List<V> getOddIndexedValuesFrom(Collection<V> arg) {
    if (null == arg || arg.isEmpty()) {
        return Collections.EMPTY_LIST;
    }/*  w  ww.j a va 2s  .  c o m*/
    return getIndexedValuesFrom(arg, 1);
}

From source file:Main.java

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