com.nwawsoft.util.math

Class Math

java.lang.Object

com.nwawsoft.util.math.Math

public class Math
extends java.lang.Object

Provides additional math functions and functions to work with native numerical data types such as int or double.

Constructor Summary

Constructors

Constructor and Description
Math()

Method Summary

Modifier and Type	Method and Description
static int	getDivisors(int candidate) Returns the amount of divisors the candidate has, including 1 and the candidate itself.
static int	round(double pDouble) Wrapper for roundDoubleToInt(double).
static int	roundDoubleToInt(double pDouble) Rounds the specified double down (2.001 - 2.499 to 2) or up (2.5 - 2.999 to 3) and returns the result as an int.
static int	sumFromXToY(int x, int y) Returns the sum of all integer values from a specified lower bound to a specified upper bound, including both bounds.
static int	sumUpToX(int x) Returns the sum of all integer values from 1 to the specified upper bound, including 1 and the upper bound.
static double	xToThePowerOfN(double x, int n) Calculates x^n.
static float	xToThePowerOfN(float x, int n) Calculates x^n.
static int	xToThePowerOfN(int x, int n) Calculates x^n.

Methods inherited from class java.lang.Object

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

Constructor Detail

Math

public Math()

Method Detail

roundDoubleToInt

public static int roundDoubleToInt(double pDouble)

Rounds the specified double down (2.001 - 2.499 to 2) or up (2.5 - 2.999 to 3) and returns the result as an int.

Parameters:

pDouble - the double to round.

Returns:

the corresponding int.

xToThePowerOfN

public static int xToThePowerOfN(int x,
                                 int n)

Calculates x^n.

Parameters:

x - any number

n - any natural, positive number

Returns:

the result of x^n

xToThePowerOfN

public static float xToThePowerOfN(float x,
                                   int n)

Calculates x^n.

Parameters:

x - any number

n - any natural, positive number

Returns:

the result of x^n

xToThePowerOfN

public static double xToThePowerOfN(double x,
                                    int n)

Calculates x^n.

Parameters:

x - any number

n - any natural, positive number

Returns:

the result of x^n

getDivisors

public static int getDivisors(int candidate)

Returns the amount of divisors the candidate has, including 1 and the candidate itself. For candidate = 1 this will only be 1.

Parameters:

candidate - the number to check for its divisor amount.

Returns:

the amount of divisors the candidate has, including 1 and the candidate itself.

round

public static int round(double pDouble)

Wrapper for roundDoubleToInt(double). Rounds the specified double down (2.001 - 2.499 to 2) or up (2.5 - 2.999 to 3) and returns the result as an int.

Parameters:

pDouble - the double to round.

Returns:

the corresponding int.

sumUpToX

public static int sumUpToX(int x)

Returns the sum of all integer values from 1 to the specified upper bound, including 1 and the upper bound. If x = 1 this will return 1. If an error occurs this function returns the value -1.

Parameters:

x - upper bound.

Returns:

the sum of all integers from 1 to x.

sumFromXToY

public static int sumFromXToY(int x,
                              int y)

Returns the sum of all integer values from a specified lower bound to a specified upper bound, including both bounds. If x = y this will return x. If an error occurs this function returns the value -1.

Parameters:

x - lower bound.

y - upper bound.

Returns:

the sum of all integers from x to y.