cn.hutool.core.lang

Class WeightListRandom<E>

java.lang.Object

cn.hutool.core.lang.WeightListRandom<E>

Type Parameters:

E - 元素类型

All Implemented Interfaces:

Serializable

public class WeightListRandom<E>
extends Object
implements Serializable

动态按权重随机的随机池，底层是list实现。

Since:

5.8.33

Author:

王叶峰

See Also:

Serialized Form

Constructor Summary

Constructors

Constructor and Description
WeightListRandom() 构造
WeightListRandom(int poolSize) 构造

Method Summary

Modifier and Type	Method and Description
void	add(E e, double weight) 添加元素
boolean	isEmpty() 判断随机池是否为空
E	next() 随机出一个元素
E	randomByWeight(double weight) 按照给定的总权重随机出一个元素
boolean	remove(E e) 移除元素

Methods inherited from class java.lang.Object

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

Constructor Detail

WeightListRandom

public WeightListRandom()

构造

WeightListRandom

public WeightListRandom(int poolSize)

构造

Parameters:

poolSize - 容量

Method Detail

add

public void add(E e,
                double weight)

添加元素

Parameters:

e - 元素

weight - 权重

remove

public boolean remove(E e)

移除元素

Parameters:

e - 元素

Returns:

是否移除成功

next

public E next()

随机出一个元素

Returns:

随机池的一个元素

randomByWeight

public E randomByWeight(double weight)

按照给定的总权重随机出一个元素

Parameters:

weight - 总权重

Returns:

随机池的一个元素或者null

isEmpty

public boolean isEmpty()

判断随机池是否为空

Returns:

是否为空