CollectionUtils (Codelogger Utils 1.0.0 API)

java.lang.Object
- org.codelogger.utils.CollectionUtils

```
public class CollectionUtils
extends Object
```
A useful tools to handle collection, likes judge empty, not empty, get first or null, to list, to set, to array and so on...

Author:

DengDefei

Method Summary

Methods
Modifier and Type	Method and Description
`static <T> List<T>`	`disorder(Collection<T> collection)` 将给定的集合打乱，并全部添加到一个新的List,此操作不会影响传入的对象.
`static <T> int`	`getCount(Collection<T> collection)`
`static <T> T`	`getFirstNotNullValue(Collection<T> collection)` Returns the first not null element if the collection is not null and have not null value, else return null.
`static <T> T`	`getFirstOrNull(Collection<T> collection)` Return either the first element when the collection is not null and empty or null.
`static <T> T`	`getLastElement(Collection<T> collection)`
`static boolean`	`isCollection(Object collection)` Returns true if the collection is implements Collection; false otherwise.
`static boolean`	`isEmpty(Collection<?> collection)` Returns true if the collection is null or empty; false otherwise.
`static boolean`	`isNotEmpty(Collection<?> collection)` Returns true if the collection is both not null and not empty; false otherwise.
`static <T> String`	`join(Collection<T> collection, String separator)` 按指定的分割符拼接集合里的元素。
`static String`	`join(Object collection, String separator)` 按指定的分割符拼接集合里的元素。
`static <T> T[]`	`toArray(Collection<T> collection)` Convert given collection to an array.
`static <T> List<T>`	`toList(Collection<T> collection)` Convert given collection to a list.
`static <T> Set<T>`	`toSet(Collection<T> collection)` Convert given collection to a set.

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

- Method Detail
  - isCollection
```
public static boolean isCollection(Object collection)
```
    Returns true if the collection is implements Collection; false otherwise.
    
    Parameters:
    collection - the collection to be tested.
    
    Returns:
    true if the collection is implements Collection; false otherwise.
  - isEmpty
```
public static boolean isEmpty(Collection<?> collection)
```
    Returns true if the collection is null or empty; false otherwise.
    
    Parameters:
    collection - the collection to be tested.
    
    Returns:
    true if the collection is null or empty; false otherwise.
  - isNotEmpty
```
public static boolean isNotEmpty(Collection<?> collection)
```
    Returns true if the collection is both not null and not empty; false otherwise.
    
    Parameters:
    collection - the collection to be tested.
    
    Returns:
    true if the collection is both not null and not empty; false otherwise.
  - getFirstOrNull
```
public static <T> T getFirstOrNull(Collection<T> collection)
```
    Return either the first element when the collection is not null and empty or null.
    
    Parameters:
    collection - the collection to handle.
    
    Returns:
    the first element when the collection is not null and empty or null.
  - getFirstNotNullValue
```
public static <T> T getFirstNotNullValue(Collection<T> collection)
```
    Returns the first not null element if the collection is not null and have not null value, else return null.
    
    Parameters:
    collection - the collection to be handled.
    
    Returns:
    the first not null element if the collection is not null and have not null value, else null.
  - toList
```
public static <T> List<T> toList(Collection<T> collection)
```
    Convert given collection to a list.
    
    Parameters:
    collection - source collection.
    
    Returns:
    a list has full given collection element and order by collection index.
  - toSet
```
public static <T> Set<T> toSet(Collection<T> collection)
```
    Convert given collection to a set.
    
    Parameters:
    collection - source collection.
    
    Returns:
    a set has all unique element of given collection.
  - toArray
```
public static <T> T[] toArray(Collection<T> collection)
```
    Convert given collection to an array.
    
    Parameters:
    collection - source collection.
    
    Returns:
    an array has full given collection element and order by collection index.
  - disorder
```
public static <T> List<T> disorder(Collection<T> collection)
```
    将给定的集合打乱，并全部添加到一个新的List,此操作不会影响传入的对象.
    
    Parameters:
    collection - 任意的集体类型。
    
    Returns:
    一个无序的List.
  - getLastElement
```
public static <T> T getLastElement(Collection<T> collection)
```
  - getCount
```
public static <T> int getCount(Collection<T> collection)
```
  - join
```
public static <T> String join(Collection<T> collection,
              String separator)
```
    按指定的分割符拼接集合里的元素。
    
    Parameters:
    collection - 任意集合。
    separator - 分割符
    
    Returns:
    按指定的分割符拼接集合里的元素的字符串。
  - join
```
public static String join(Object collection,
          String separator)
```
    按指定的分割符拼接集合里的元素。
    
    Parameters:
    collection - 任意集合。
    separator - 分割符
    
    Returns:
    按指定的分割符拼接集合里的元素的字符串。

Class CollectionUtils

Method Summary

Methods inherited from class java.lang.Object

Method Detail

isCollection

isEmpty

isNotEmpty

getFirstOrNull

getFirstNotNullValue

toList

toSet

toArray

disorder

getLastElement

getCount

join

join