
public class CollectionUtils

Miscellaneous Collection utility methods.

Nested Classes
Modifier and Type	Class	Description

Fields
Modifier and Type	Field	Description
`public final static CollectionUtils`	`INSTANCE`

Constructors
Constructor	Description

Enum Constants
Enum Constant	Description

Modifier and Type	Method	Description
`final static Boolean`	`isEmpty(Collection<?> collection)`	Null-safe check if the specified Collection is empty.
`final static Boolean`	`isEmpty(Map<?, ?> map)`	Null-safe check if the specified Map is empty.
`final static Boolean`	`isNotEmpty(Collection<?> collection)`	Null-safe check if the specified Collection is not empty.
`final static Boolean`	`isNotEmpty(Map<?, ?> map)`	Null-safe check if the specified Map is not empty.
`final static <T extends Any> Set<T>`	`defaultIfEmpty(Set<T> set, Set<T> defaultSet)`	Returns defaultSet if the given set is null or empty; otherwise set.
`final static <T extends Any> List<T>`	`defaultIfEmpty(List<T> list, List<T> defaultList)`	Returns defaultList if the given list is null or empty; otherwise list.
`final static <K extends Any, V extends Any> Map<K, V>`	`defaultIfEmpty(Map<K, V> map, Map<K, V> defaultMap)`	Returns defaultMap if the given map is null or empty; otherwise map.
`final static List<String>`	`toNotBlankStringList(String args)`	Create and return a list of not blank strings from the given args.

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

@SinceKotlin(version = "999.9") final static Boolean isEmpty(Collection<?> collection)

Null-safe check if the specified Collection is empty.

@SinceKotlin(version = "999.9") final static Boolean isEmpty(Map<?, ?> map)

Null-safe check if the specified Map is empty.

@SinceKotlin(version = "999.9") final static Boolean isNotEmpty(Collection<?> collection)

Null-safe check if the specified Collection is not empty.

@SinceKotlin(version = "999.9") final static Boolean isNotEmpty(Map<?, ?> map)

Null-safe check if the specified Map is not empty.

@SinceKotlin(version = "999.9") final static <T extends Any> Set<T> defaultIfEmpty(Set<T> set, Set<T> defaultSet)

Returns defaultSet if the given set is null or empty; otherwise set.

@SinceKotlin(version = "999.9") final static <T extends Any> List<T> defaultIfEmpty(List<T> list, List<T> defaultList)

Returns defaultList if the given list is null or empty; otherwise list.

@SinceKotlin(version = "999.9") final static <K extends Any, V extends Any> Map<K, V> defaultIfEmpty(Map<K, V> map, Map<K, V> defaultMap)

Returns defaultMap if the given map is null or empty; otherwise map.

toNotBlankStringList
```
 final static List<String> toNotBlankStringList(String args)
```
Create and return a list of not blank strings from the given args.

Object CollectionUtils