Module seppiko.commons.utils

Package org.seppiko.commons.utils

Class MathUtil

java.lang.Object

org.seppiko.commons.utils.MathUtil

public class MathUtil
extends Object

Math Util

Author:

Leonard Woo

Method Summary

Modifier and Type	Method	Description
static double	avgDecimal(List<BigDecimal> nums)	BigDecimal list avg number
static BigDecimal	avgDecimal(List<BigDecimal> nums, RoundingMode roundingMode)	BigDecimal list avg number
static BigDecimal	avgInteger(List<BigInteger> nums, RoundingMode roundingMode)	BigInteger list avg number
static String	convertDecimalTo(long num, char[] alphabet)	Convert decimal to alphabet number
static Long	convertToDecimal(CharSequence num, char[] alphabet)	Convert alphabet number to decimal
static BigDecimal	maxDecimal(List<BigDecimal> nums)	BigDecimal list max number
static BigInteger	maxInteger(List<BigInteger> nums)	BigInteger list max number
static BigDecimal	minDecimal(List<BigDecimal> nums)	BigDecimal list min number
static BigInteger	minInteger(List<BigInteger> nums)	BigInteger list min number
static BigDecimal	pow(double a, int b)	Returns the value of the first argument raised to the power of the second argument.
static BigInteger	pow(int a, int b)	Returns the value of the first argument raised to the power of the second argument.
static BigInteger	pow(long a, int b)	Returns the value of the first argument raised to the power of the second argument.
static BigDecimal	pow(BigDecimal a, int b)	Returns the value of the first argument raised to the power of the second argument.
static BigInteger	pow(BigInteger a, int b)	Returns the value of the first argument raised to the power of the second argument.

Methods inherited from class java.lang.Object

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

Method Details

maxDecimal

public static BigDecimal maxDecimal(List<BigDecimal> nums)
                             throws NoSuchElementException

BigDecimal list max number

Parameters:

nums - number list

Returns:

maximum

Throws:

NoSuchElementException - list is null

maxInteger

public static BigInteger maxInteger(List<BigInteger> nums)
                             throws NoSuchElementException

BigInteger list max number

Parameters:

nums - number list

Returns:

maximum

Throws:

NoSuchElementException - list is null

minDecimal

public static BigDecimal minDecimal(List<BigDecimal> nums)
                             throws NoSuchElementException

BigDecimal list min number

Parameters:

nums - number list

Returns:

minimum

Throws:

NoSuchElementException - list is null

minInteger

public static BigInteger minInteger(List<BigInteger> nums)
                             throws NoSuchElementException

BigInteger list min number

Parameters:

nums - number list

Returns:

minimum

Throws:

NoSuchElementException - list is null

avgDecimal

public static BigDecimal avgDecimal(List<BigDecimal> nums,
 RoundingMode roundingMode)

BigDecimal list avg number

Parameters:

nums - number list

roundingMode - RoundingMode

Returns:

average

avgDecimal

public static double avgDecimal(List<BigDecimal> nums)
                         throws NoSuchElementException

BigDecimal list avg number

Parameters:

nums - number list

Returns:

average double

Throws:

NoSuchElementException - list is null

avgInteger

public static BigDecimal avgInteger(List<BigInteger> nums,
 RoundingMode roundingMode)

BigInteger list avg number

Parameters:

nums - number list

roundingMode - RoundingMode

Returns:

average

pow

public static BigInteger pow(int a,
 int b)

Returns the value of the first argument raised to the power of the second argument.

Parameters:

a - the base.

b - the exponent.

Returns:

the value ab.

pow

public static BigInteger pow(long a,
 int b)

Returns the value of the first argument raised to the power of the second argument.

Parameters:

a - the base.

b - the exponent.

Returns:

the value ab.

pow

public static BigInteger pow(BigInteger a,
 int b)

Returns the value of the first argument raised to the power of the second argument.

Parameters:

a - the base.

b - the exponent.

Returns:

the value ab.

pow

public static BigDecimal pow(double a,
 int b)

Returns the value of the first argument raised to the power of the second argument.

Parameters:

a - the base.

b - the exponent.

Returns:

the value ab.

pow

public static BigDecimal pow(BigDecimal a,
 int b)

Returns the value of the first argument raised to the power of the second argument.

Parameters:

a - the base.

b - the exponent.

Returns:

the value ab.

convertDecimalTo

public static String convertDecimalTo(long num,
 char[] alphabet)

Convert decimal to alphabet number

Parameters:

num - number (greater than 0)

alphabet - alphabet

Returns:

alphabet base, if num lass than 1 will return null

convertToDecimal

public static Long convertToDecimal(CharSequence num,
 char[] alphabet)

Convert alphabet number to decimal

Parameters:

num - number

alphabet - alphabet

Returns:

if return null than num parser failed