com.baidu.hugegraph.util

类 CollectionUtil

java.lang.Object

com.baidu.hugegraph.util.CollectionUtil

public final class CollectionUtil
extends Object

构造器概要

构造器

构造器和说明
CollectionUtil()

方法概要

限定符和类型	方法和说明
static boolean	allUnique(Collection<?> collection)
static <T> boolean	hasIntersection(List<T> first, Set<T> second)
static <T> boolean	hasIntersection(Set<T> first, Set<T> second)
static <T> Collection<T>	intersect(Collection<T> first, Collection<T> second) Find the intersection of two collections, the original collections will not be modified
static <T> Collection<T>	intersectWithModify(Collection<T> first, Collection<T> second) Find the intersection of two collections, note that the first collection will be modified and store the results
static <T> boolean	prefixOf(List<T> prefix, List<T> all)
static <T> Set<T>	subSet(Set<T> original, int from, int to) Get sub-set of a set.
static <T> List<T>	toList(Object array)
static <T> Set<T>	union(Collection<T> first, Collection<T> second)

从类继承的方法 java.lang.Object

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

构造器详细资料

CollectionUtil

public CollectionUtil()

方法详细资料

toList

public static <T> List<T> toList(Object array)

prefixOf

public static <T> boolean prefixOf(List<T> prefix,
                                   List<T> all)

allUnique

public static boolean allUnique(Collection<?> collection)

subSet

public static <T> Set<T> subSet(Set<T> original,
                                int from,
                                int to)

Get sub-set of a set.

类型参数:

T - element type of set

参数:

original - original set

from - index of start position

to - index of end position(exclude), but -1 means the last element

返回:

sub-set of original set [from, to)

union

public static <T> Set<T> union(Collection<T> first,
                               Collection<T> second)

intersect

public static <T> Collection<T> intersect(Collection<T> first,
                                          Collection<T> second)

Find the intersection of two collections, the original collections will not be modified

类型参数:

T - element type of collection

参数:

first - the first collection

second - the second collection

返回:

intersection of the two collections

intersectWithModify

public static <T> Collection<T> intersectWithModify(Collection<T> first,
                                                    Collection<T> second)

Find the intersection of two collections, note that the first collection will be modified and store the results

类型参数:

T - element type of collection

参数:

first - the first collection, it will be modified

second - the second collection

返回:

intersection of the two collections

hasIntersection

public static <T> boolean hasIntersection(List<T> first,
                                          Set<T> second)

hasIntersection

public static <T> boolean hasIntersection(Set<T> first,
                                          Set<T> second)