程序包 cn.vorbote.commons

类 MathUtil

java.lang.Object

cn.vorbote.commons.MathUtil

public final class MathUtil
extends Object

This util class can make some formal calculation.

方法概要

修饰符和类型	方法	说明
static double	Average(Collection<? extends Number> numbers)	Get the average value of the numbers
static long	Factorial(int n)	Calc the factorial of n
static boolean	IsBetween(Number num, Number noLess, Number noGreater)	Check the num whether is between the noLess and noGreater number
static boolean	IsNotBetween(Number num, Number noLess, Number noGreater)	Check the num whether is not between the noLess and noGreater number
static double	Sum(Collection<? extends Number> numbers)	Get the sum of the numbers
static String	ToBinaryString(int value)
static String	ToHexString(int value, boolean toUpper)	Transformat a decimal number to hex number.
static String	ToOctalString(int value)

从类继承的方法 java.lang.Object

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

方法详细资料

Factorial

public static long Factorial(int n)

Calc the factorial of n

参数:

n - The number N should greater or equal to 0

返回:

The result of factorial n

抛出:

RuntimeException - The n should greater or equal to 0

Sum

public static double Sum(Collection<? extends Number> numbers)

Get the sum of the numbers

参数:

numbers - The numbers

返回:

The sum value of the numbers

Average

public static double Average(Collection<? extends Number> numbers)

Get the average value of the numbers

参数:

numbers - The numbers

返回:

The average value of the numbers

IsBetween

public static boolean IsBetween(Number num,
                                Number noLess,
                                Number noGreater)

Check the num whether is between the noLess and noGreater number

参数:

num - The number

noLess - The num should not less than this number.

noGreater - The num should not bigger than this number.

返回:

True while num no less than noLess and num no graeter than noGreater.

IsNotBetween

public static boolean IsNotBetween(Number num,
                                   Number noLess,
                                   Number noGreater)

Check the num whether is not between the noLess and noGreater number

参数:

num - The number

noLess - The num should not less than this number.

noGreater - The num should not bigger than this number.

返回:

True while num no less than noLess and num no graeter than noGreater.

ToHexString

public static String ToHexString(int value,
                                 boolean toUpper)

Transformat a decimal number to hex number.

参数:

value - The number with decimal format.

toUpper - To specify will it be transformatted to Upper case. Default in lower case.

返回:

The hex string of the number.

ToBinaryString

public static String ToBinaryString(int value)

ToOctalString

public static String ToOctalString(int value)