Example usage for java.math BigDecimal divide

Introduction

In this page you can find the example usage for java.math BigDecimal divide.

Prototype

public BigDecimal divide(BigDecimal divisor, MathContext mc) 

Source Link

Document

Returns a BigDecimal whose value is (this / divisor) , with rounding according to the context settings.

Usage

From source file:Util.java

public static BigDecimal sqrt(BigDecimal number, BigDecimal guess, RoundingMode rounding) {
    BigDecimal result = BigDecimalZERO;
    BigDecimal flipA = result;//from w  ww.  j  a  va  2  s .co m
    BigDecimal flipB = result;
    boolean first = true;
    while (result.compareTo(guess) != 0) {
        if (!first)
            guess = result;
        else
            first = false;

        result = number.divide(guess, rounding).add(guess).divide(BigDecimalTWO, rounding);
        // handle flip flops
        if (result.equals(flipB))
            return flipA;

        flipB = flipA;
        flipA = result;
    }
    return result;
}

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From source file:nl.strohalm.cyclos.utils.DateHelper.java

/**
 * Returns the number of days between 2 dates as a BigDecimal. Will be negative if date2 < date1, or positive otherwise.
 *//*from   ww w .j  a va 2  s .c  o m*/
public static BigDecimal decimalDaysBetween(final Calendar date1, final Calendar date2) {
    if (date1 == null || date2 == null) {
        return BigDecimal.ZERO;
    }
    final BigDecimal difference = new BigDecimal(date2.getTimeInMillis() - date1.getTimeInMillis());
    final MathContext mathContext = new MathContext(LocalSettings.MAX_PRECISION);
    final BigDecimal result = difference.divide(new BigDecimal(DateUtils.MILLIS_PER_DAY), mathContext);
    return result;
}

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From source file:org.kuali.kpme.core.util.TKUtils.java

public static BigDecimal convertMinutesToHours(BigDecimal minutes) {
    return minutes.divide(HrConstants.BIG_DECIMAL_60, HrConstants.MATH_CONTEXT);
}

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From source file:org.kuali.kpme.core.util.TKUtils.java

public static BigDecimal convertMillisToDays(long millis) {
    BigDecimal hrs = convertMillisToHours(millis);
    return hrs.divide(HrConstants.BIG_DECIMAL_HRS_IN_DAY, HrConstants.MATH_CONTEXT);
}

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From source file:Main.java

/** Returns Map with total, squaredTotal, count, average, stdDev, maximum; fieldName field in Maps must have type BigDecimal;
 * if count of non-null fields is less than 2 returns null as cannot calculate a standard deviation */
public static Map<String, BigDecimal> stdDevMaxFromMapField(List<Map<String, Object>> dataList,
        String fieldName, BigDecimal stdDevMultiplier) {
    BigDecimal total = BigDecimal.ZERO;
    BigDecimal squaredTotal = BigDecimal.ZERO;
    int count = 0;
    for (Map<String, Object> dataMap : dataList) {
        if (dataMap == null)
            continue;
        BigDecimal value = (BigDecimal) dataMap.get(fieldName);
        if (value == null)
            continue;
        total = total.add(value);/*from ww  w .j a va  2  s  .  c om*/
        squaredTotal = squaredTotal.add(value.multiply(value));
        count++;
    }
    if (count < 2)
        return null;

    BigDecimal countBd = new BigDecimal(count);
    BigDecimal average = total.divide(countBd, BigDecimal.ROUND_HALF_UP);
    double totalDouble = total.doubleValue();
    BigDecimal stdDev = new BigDecimal(Math
            .sqrt(Math.abs(squaredTotal.doubleValue() - ((totalDouble * totalDouble) / count)) / (count - 1)));

    Map<String, BigDecimal> retMap = new HashMap<>(6);
    retMap.put("total", total);
    retMap.put("squaredTotal", squaredTotal);
    retMap.put("count", countBd);
    retMap.put("average", average);
    retMap.put("stdDev", stdDev);

    if (stdDevMultiplier != null)
        retMap.put("maximum", average.add(stdDev.multiply(stdDevMultiplier)));

    return retMap;
}

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From source file:br.msf.commons.util.AbstractDateUtils.java

public static BigDecimal getDifferenceInDays(final Object date1, final Object date2,
        final boolean ignoreTimeInfo) {
    ArgumentUtils.rejectIfAnyNull(date1, date2);

    Calendar c1 = toUtcCalendar(date1);
    Calendar c2 = toUtcCalendar(date2);
    if (ignoreTimeInfo) {
        c1 = getTimeTruncatedInternal(c1);
        c2 = getTimeTruncatedInternal(c2);
    }/* w  w w.  j  a  v  a2  s  .c om*/
    final long l1 = c1.getTimeInMillis();
    final long l2 = c2.getTimeInMillis();
    BigDecimal res;
    if (l1 > l2) {
        res = new BigDecimal(l1 - l2);
    } else {
        res = new BigDecimal(l2 - l1);
    }
    return NumberUtils.round(res.divide(MILLISECS_PER_DAY, MathContext.DECIMAL128), 2);
}

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From source file:Main.java

/**
 * NOTE: Arithmetic operations in primitive types may lead to arithmetic overflow. To retain
 * precision, BigDecimal objects are used.
 *
 * @param rgb// w w  w .j a  v a2  s  . c  om
 * @return
 */
public static int[] convertRGB_8_8_8_To_HSB_32_32_32(int[] rgb) {
    int[] hsb = new int[3];
    int maxChroma = Math.max(Math.max(rgb[0], rgb[1]), rgb[2]);
    int minChroma = Math.min(Math.min(rgb[0], rgb[1]), rgb[2]);
    int diff = maxChroma - minChroma;

    // Hue
    BigDecimal hue;
    if (diff == 0) {
        hue = BigDecimal.ZERO;
    } else if (maxChroma == rgb[0]) {
        float tmp = (rgb[1] - rgb[2]) / (float) diff;
        if (tmp < 0) {
            tmp += 6 * Math.ceil(-tmp / 6.0);
        } else {
            tmp -= 6 * Math.floor(tmp / 6.0);
        }
        hue = BigDecimal.valueOf(tmp);
    } else if (maxChroma == rgb[1]) {
        hue = BigDecimal.valueOf((rgb[2] - rgb[0]) / (float) diff + 2);
    } else {
        hue = BigDecimal.valueOf((rgb[0] - rgb[1]) / (float) diff + 4);
    }
    // [0, 360] -> [0, 0xffffffff]
    hue = hue.multiply(BigDecimal.valueOf(0xffffffffL));
    hue = hue.divide(BigDecimal.valueOf(6), RoundingMode.FLOOR);
    hsb[0] = ByteBuffer.allocate(8).putLong(hue.longValue()).getInt(4);

    // Saturation
    if (maxChroma == 0) {
        hsb[1] = 0;
    } else {
        // [0, 1] -> [0, 0xffffffff]
        BigDecimal sat = BigDecimal.valueOf(diff);
        sat = sat.multiply(BigDecimal.valueOf(0xffffffffL));
        sat = sat.divide(BigDecimal.valueOf(maxChroma), RoundingMode.FLOOR);
        hsb[1] = ByteBuffer.allocate(8).putLong(sat.longValue()).getInt(4);
    }

    // Brightness
    // [0, 255] -> [0, 0xffffffff]
    BigDecimal brightness = BigDecimal.valueOf(maxChroma);
    brightness = brightness.multiply(BigDecimal.valueOf(0xffffffffL));
    brightness = brightness.divide(BigDecimal.valueOf(0xffL), RoundingMode.FLOOR);
    hsb[2] = ByteBuffer.allocate(8).putLong(brightness.longValue()).getInt(4);

    return hsb;
}

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From source file:com.liferay.util.FileUtil.java

public static String getsize(File fileName) {
    String finalVal;/*from w w  w  . j  a  va  2s.  c  om*/
    long filesize = fileName.length();
    BigDecimal size = new BigDecimal(filesize);
    BigDecimal byteVal = null;
    BigDecimal changedByteVal = null;
    finalVal = "";
    if (filesize <= 0) {
        finalVal = "";
    } else if (filesize < MEGA_BYTE) {
        byteVal = new BigDecimal(KILO_BYTE);
        if (size != null) {
            changedByteVal = size.divide(byteVal, MathContext.UNLIMITED);
            finalVal = Long.toString(Math.round(Math.ceil(changedByteVal.doubleValue()))) + " KB";
        }
    } else if (filesize < GIGA_BYTE) {
        byteVal = new BigDecimal(MEGA_BYTE);
        if (size != null) {
            changedByteVal = size.divide(byteVal, MathContext.UNLIMITED);
            finalVal = Long.toString(Math.round(Math.ceil(changedByteVal.doubleValue()))) + " MB";
        }
    } else if (filesize < TERA_BYTE) {
        byteVal = new BigDecimal(GIGA_BYTE);
        if (size != null) {
            changedByteVal = size.divide(byteVal, MathContext.UNLIMITED);
            finalVal = Long.toString(Math.round(Math.ceil(changedByteVal.doubleValue()))) + " GB";
        }
    } else {
        byteVal = new BigDecimal(TERA_BYTE);
        if (size != null) {
            changedByteVal = size.divide(byteVal, MathContext.UNLIMITED);
            finalVal = Long.toString(Math.round(Math.ceil(changedByteVal.doubleValue()))) + " TB";
        }
    }
    return finalVal;
}

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From source file:org.mifosplatform.portfolio.loanaccount.domain.LoanCharge.java

public static BigDecimal percentageOf(final BigDecimal value, final BigDecimal percentage) {

    BigDecimal percentageOf = BigDecimal.ZERO;

    if (isGreaterThanZero(value)) {
        final MathContext mc = new MathContext(8, RoundingMode.HALF_EVEN);
        final BigDecimal multiplicand = percentage.divide(BigDecimal.valueOf(100l), mc);
        percentageOf = value.multiply(multiplicand, mc);
    }/*from  ww  w.j  a va  2 s.  c  om*/
    return percentageOf;
}

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From source file:com.idylwood.utils.MathUtils.java

final public static double meanArbPrec(final double data[]) {
    BigDecimal mean = new BigDecimal(0);
    for (double x : data)
        mean = mean.add(new BigDecimal(x), MathContext.UNLIMITED);
    mean = mean.divide(new BigDecimal(data.length), MathContext.UNLIMITED);
    return mean.doubleValue();
}

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