Package com.cedarsoftware.util

Class CollectionUtilities

java.lang.Object

com.cedarsoftware.util.CollectionUtilities

public class CollectionUtilities
extends Object

Author:

John DeRegnaucourt (jdereg@gmail.com)
Copyright (c) Cedar Software LLC

Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at

License

Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License.

Constructor Summary

Constructors

Constructor	Description
CollectionUtilities()

Method Summary

Modifier and Type	Method	Description
static boolean	hasContent(Collection col)	This is a null-safe isEmpty check.
static boolean	isEmpty(Collection col)	This is a null-safe isEmpty check.
static <T> List<T>	listOf(T... items)	For JDK1.8 support.
static <T> Set<T>	setOf(T... items)	For JDK1.8 support.
static int	size(Collection col)	This is a null-safe size check.

Methods inherited from class java.lang.Object

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

Constructor Details

CollectionUtilities

public CollectionUtilities()

Method Details

isEmpty

public static boolean isEmpty(Collection col)

This is a null-safe isEmpty check.

Parameters:

col - Collection to check

Returns:

true if empty or null

hasContent

public static boolean hasContent(Collection col)

This is a null-safe isEmpty check.

Parameters:

col - Collection to check

Returns:

true if empty or null

size

public static int size(Collection col)

This is a null-safe size check.

Parameters:

col - Collection to check

Returns:

true if empty or null

listOf

@SafeVarargs
public static <T> List<T> listOf(T... items)

For JDK1.8 support. Remove this and change to List.of() for JDK11+

setOf

@SafeVarargs
public static <T> Set<T> setOf(T... items)

For JDK1.8 support. Remove this and change to Set.of() for JDK11+