com.germ.germplugin.api.util

Class MathUtil

java.lang.Object

com.germ.germplugin.api.util.MathUtil

public class MathUtil
extends java.lang.Object

Constructor Summary

Constructors

Constructor and Description
MathUtil()

Method Summary

Modifier and Type	Method and Description
static int	execDisorder(int filter, int total)
static java.util.Set<int[]>	execDisorderFilter(int[] shu, int targ)
static int	execDisorderSum(int total) 无序排列组合
static int	execStep(int value) 求一个数的阶梯积

Methods inherited from class java.lang.Object

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

Constructor Detail

MathUtil

public MathUtil()

Method Detail

execDisorderSum

public static int execDisorderSum(int total)

无序排列组合

Parameters:

total - 从几个里面抽取元素

Returns:

一种有几种可能

execDisorder

public static int execDisorder(int filter,
                               int total)

Parameters:

filter - 要抽几个

total - 从几个里面挑选

Returns:

一共有几种可能

execStep

public static int execStep(int value)

求一个数的阶梯积

Parameters:

value -

Returns:

execDisorderFilter

public static java.util.Set<int[]> execDisorderFilter(int[] shu,
                                                      int targ)

Parameters:

shu - 数字的集合

targ - 需要筛选出几个

Returns:

结果集