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Class com.ibm.eou.toolkit.util.MathUtils

java.lang.Object
   |
   +----com.ibm.eou.toolkit.util.MathUtils

public class MathUtils

extends Object

getHighestCommonFactor(int, int)

Return the highest common factor of two integers.

getHighestCommonFactor(long, long)

Return the highest common factor of two integers.

getNumberOfBits(int)

Return the number of bits required to store the given integer.

getNumberOfDigits(int, int)

Return the number of digits required to represent the given integer in the given base.

pow(int, int)

Raises an integer to a positive integer exponent.

roundDownToNextMultiple(int, int)

Round down the passed in value according to the passed in multiple.

roundUpToNextMultiple(int, int)

Round up the passed in value according to the passed in multiple.

 public static int getHighestCommonFactor(int a,
                                          int b)

Return the highest common factor of two integers. If either integer is zero, zero is returned. Otherwise, Euclid's algorithm is employed.

 public static long getHighestCommonFactor(long a,
                                           long b)

Return the highest common factor of two integers. If either integer is zero, zero is returned. Otherwise, Euclid's algorithm is employed.

 public static int getNumberOfBits(int x)

Return the number of bits required to store the given integer. That is, the smallest N such that ANDing the given integer with (1<

 public static int getNumberOfDigits(int x,
                                     int base)

Return the number of digits required to represent the given integer in the given base.

 public static int roundUpToNextMultiple(int value,
                                         int multiple)

Round up the passed in value according to the passed in multiple. Both positive and negative multiples are dealt with correctly.

Parameters:

value - the integer to be rounded

multiple - the integer to which value is to be rounded up to

Returns:

the rounded value

Throws: IllegalArgumentException

thrown if multiple is zero

See Also:

roundDownToNextMultiple

 public static int roundDownToNextMultiple(int value,
                                           int multiple)

Round down the passed in value according to the passed in multiple. Both positive and negative multiples are dealt with correctly.

Parameters:

value - the integer to be rounded

multiple - the integer to which value is to be rounded down to

Returns:

the rounded value

Throws: IllegalArgumentException

thrown if multiple is zero

See Also:

roundUpToNextMultiple

 public static int pow(int number,
                       int exponent)

Raises an integer to a positive integer exponent.

Parameters:

number - the number to be raised by the specified power

exponent - the power to which the number will be raised

Returns:

the number raised to the exponent

Throws: IllegalArgumentException

thrown if exponent is not postive

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