cn.hutool.core.collection

Class Partition<T>

java.lang.Object

java.util.AbstractCollection<E>

java.util.AbstractList<List<T>>

cn.hutool.core.collection.Partition<T>

Type Parameters:

T - 元素类型

All Implemented Interfaces:

Iterable<List<T>>, Collection<List<T>>, List<List<T>>

Direct Known Subclasses:

AvgPartition, RandomAccessPartition

public class Partition<T>
extends AbstractList<List<T>>

列表分区或分段
通过传入分区长度，将指定列表分区为不同的块，每块区域的长度相同（最后一块可能小于长度）
分区是在原List的基础上进行的，返回的分区是不可变的抽象列表，原列表元素变更，分区中元素也会变更。 参考：Guava的Lists#Partition

Since:

5.7.10

Author:

looly, guava

Field Summary

Fields

Modifier and Type	Field and Description
protected List<T>	list
protected int	size

Fields inherited from class java.util.AbstractList

modCount

Constructor Summary

Constructors

Constructor and Description
Partition(List<T> list, int size) 列表分区

Method Summary

Modifier and Type	Method and Description
List<T>	get(int index)
boolean	isEmpty()
int	size()

Methods inherited from class java.util.AbstractList

add, add, addAll, clear, equals, hashCode, indexOf, iterator, lastIndexOf, listIterator, listIterator, remove, removeRange, set, subList

Methods inherited from class java.util.AbstractCollection

addAll, contains, containsAll, remove, removeAll, retainAll, toArray, toArray, toString

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Methods inherited from interface java.util.List

addAll, contains, containsAll, remove, removeAll, replaceAll, retainAll, sort, spliterator, toArray, toArray

Methods inherited from interface java.util.Collection

parallelStream, removeIf, stream

Methods inherited from interface java.lang.Iterable

forEach

Field Detail

list

protected final List<T> list

size

protected final int size

Constructor Detail

Partition

public Partition(List<T> list,
                 int size)

列表分区

Parameters:

list - 被分区的列表，非空

size - 每个分区的长度，必须>0

Method Detail

get

public List<T> get(int index)

Specified by:

get in interface List<List<T>>

Specified by:

get in class AbstractList<List<T>>

size

public int size()

Specified by:

size in interface Collection<List<T>>

Specified by:

size in interface List<List<T>>

Specified by:

size in class AbstractCollection<List<T>>

isEmpty

public boolean isEmpty()

Specified by:

isEmpty in interface Collection<List<T>>

Specified by:

isEmpty in interface List<List<T>>

Overrides:

isEmpty in class AbstractCollection<List<T>>