Class NumberUtil

java.lang.Object

org.nuiton.util.NumberUtil

public class NumberUtil
extends Object

Since:

3.0

Author:

Kevin Morin - morin@codelutin.com

Field Summary

Fields

Modifier and Type	Field	Description
protected static final MathContext	mc1Digit
protected static final MathContext	mc2Digits
protected static final MathContext	mc3Digits
protected static final MathContext	mc4Digits
protected static final MathContext	mc5Digits
static final com.google.common.base.Predicate<Float>	NULL_OR_ZERO_FLOAT_FIVE_DIGITS
static final com.google.common.base.Predicate<Float>	NULL_OR_ZERO_FLOAT_FOUR_DIGITS
static final com.google.common.base.Predicate<Float>	NULL_OR_ZERO_FLOAT_ONE_DIGIT
static final com.google.common.base.Predicate<Float>	NULL_OR_ZERO_FLOAT_THREE_DIGITS
static final com.google.common.base.Predicate<Float>	NULL_OR_ZERO_FLOAT_TWO_DIGITS
static final com.google.common.base.Predicate<Integer>	NULL_OR_ZERO_INTEGER

Constructor Summary

Constructors

Constructor	Description
NumberUtil()

Method Summary

Modifier and Type	Method	Description
static int[]	divideAndEnsureSum(int divisor, int dividend)	Divide the divisor by the dividend.
static Float	round(Float number, MathContext mc)
static Float	roundFiveDigits(Float number)
static Float	roundFourDigits(Float number)
static Float	roundNDigits(Float number, int digits)
static Float	roundOneDigit(Float number)
static Float	roundThreeDigits(Float number)
static Float	roundTwoDigits(Float number)

Methods inherited from class Object

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

Field Details

NULL_OR_ZERO_INTEGER

public static final com.google.common.base.Predicate<Integer> NULL_OR_ZERO_INTEGER

NULL_OR_ZERO_FLOAT_ONE_DIGIT

public static final com.google.common.base.Predicate<Float> NULL_OR_ZERO_FLOAT_ONE_DIGIT

NULL_OR_ZERO_FLOAT_TWO_DIGITS

public static final com.google.common.base.Predicate<Float> NULL_OR_ZERO_FLOAT_TWO_DIGITS

NULL_OR_ZERO_FLOAT_THREE_DIGITS

public static final com.google.common.base.Predicate<Float> NULL_OR_ZERO_FLOAT_THREE_DIGITS

NULL_OR_ZERO_FLOAT_FOUR_DIGITS

public static final com.google.common.base.Predicate<Float> NULL_OR_ZERO_FLOAT_FOUR_DIGITS

NULL_OR_ZERO_FLOAT_FIVE_DIGITS

public static final com.google.common.base.Predicate<Float> NULL_OR_ZERO_FLOAT_FIVE_DIGITS

mc1Digit

protected static final MathContext mc1Digit

mc2Digits

protected static final MathContext mc2Digits

mc3Digits

protected static final MathContext mc3Digits

mc4Digits

protected static final MathContext mc4Digits

mc5Digits

protected static final MathContext mc5Digits

Constructor Details

NumberUtil

public NumberUtil()

Method Details

divideAndEnsureSum

public static int[] divideAndEnsureSum(int divisor,
 int dividend)

Divide the divisor by the dividend. Returns an array containing the quotients rounded up or down to ensure the sum of the quotients equals the divisor.

e.g. divideAndEnsureSum(100, 3) returns {34, 33, 33}

Parameters:

divisor - the divisor

dividend - the dividend

Returns:

an array whose length equals dividend

roundOneDigit

public static Float roundOneDigit(Float number)

roundTwoDigits

public static Float roundTwoDigits(Float number)

roundThreeDigits

public static Float roundThreeDigits(Float number)

roundFourDigits

public static Float roundFourDigits(Float number)

roundFiveDigits

public static Float roundFiveDigits(Float number)

roundNDigits

public static Float roundNDigits(Float number,
 int digits)

round

public static Float round(Float number,
 MathContext mc)