Class CollKit

java.lang.Object

com.iohao.net.common.kit.CollKit

public final class CollKit
extends Object

Collection manipulation utilities.

Author:

渔民小镇

date:

2022-01-14

Method Summary

Modifier and Type	Method	Description
static boolean	isEmpty(Collection<?> collection)	Check whether the collection is null or empty.
static boolean	notEmpty(Collection<?> collection)	Check whether the collection is not null and not empty.
static <K,V> Map<K,V>	ofConcurrentHashMap()	Create a new ConcurrentHashMap.
static <T> Set<T>	ofConcurrentSet()	Create a new concurrent Set backed by a ConcurrentHashMap.

Methods inherited from class Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Method Details

notEmpty

public static boolean notEmpty(Collection<?> collection)

Check whether the collection is not null and not empty.

Parameters:

collection - the collection to check

Returns:

true if the collection contains at least one element

isEmpty

public static boolean isEmpty(Collection<?> collection)

Check whether the collection is null or empty.

Parameters:

collection - the collection to check

Returns:

true if the collection is null or contains no elements

ofConcurrentSet

public static <T> Set<T> ofConcurrentSet()

Create a new concurrent Set backed by a ConcurrentHashMap.

Type Parameters:

T - the element type

Returns:

a new thread-safe set

ofConcurrentHashMap

public static <K,V> Map<K,V> ofConcurrentHashMap()

Create a new ConcurrentHashMap.

Type Parameters:

K - the key type

V - the value type

Returns:

a new thread-safe map