Example usage for java.math BigDecimal subtract

List of usage examples for java.math BigDecimal subtract

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Introduction

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

Prototype

public BigDecimal subtract(BigDecimal subtrahend)

Source Link

Document

Returns a BigDecimal whose value is (this - subtrahend) , and whose scale is max(this.scale(), subtrahend.scale()) .

Usage

From source file:adalid.commons.util.ObjUtils.java

public static BigDecimal xMinusY(Object x, Object y) {
    BigDecimal bx = NumUtils.numberToBigDecimal(x);
    BigDecimal by = bx == null ? null : NumUtils.numberToBigDecimal(y);
    return bx == null || by == null ? null : bx.subtract(by);
}

From source file:Main.java

/**
 * Compute e^x to a given scale. Break x into its whole and fraction parts
 * and compute (e^(1 + fraction/whole))^whole using Taylor's formula.
 * //ww w  . ja va2s.  com
 * @param x
 *            the value of x
 * @param scale
 *            the desired scale of the result
 * @return the result value
 */
public static BigDecimal exp(BigDecimal x, int scale) {
    // e^0 = 1
    if (x.signum() == 0) {
        return BigDecimal.valueOf(1);
    }

    // If x is negative, return 1/(e^-x).
    else if (x.signum() == -1) {
        return BigDecimal.valueOf(1).divide(exp(x.negate(), scale), scale, BigDecimal.ROUND_HALF_EVEN);
    }

    // Compute the whole part of x.
    BigDecimal xWhole = x.setScale(0, BigDecimal.ROUND_DOWN);

    // If there isn't a whole part, compute and return e^x.
    if (xWhole.signum() == 0) {
        return expTaylor(x, scale);
    }

    // Compute the fraction part of x.
    BigDecimal xFraction = x.subtract(xWhole);

    // z = 1 + fraction/whole
    BigDecimal z = BigDecimal.valueOf(1).add(xFraction.divide(xWhole, scale, BigDecimal.ROUND_HALF_EVEN));

    // t = e^z
    BigDecimal t = expTaylor(z, scale);

    BigDecimal maxLong = BigDecimal.valueOf(Long.MAX_VALUE);
    BigDecimal result = BigDecimal.valueOf(1);

    // Compute and return t^whole using intPower().
    // If whole > Long.MAX_VALUE, then first compute products
    // of e^Long.MAX_VALUE.
    while (xWhole.compareTo(maxLong) >= 0) {
        result = result.multiply(intPower(t, Long.MAX_VALUE, scale)).setScale(scale,
                BigDecimal.ROUND_HALF_EVEN);
        xWhole = xWhole.subtract(maxLong);

        Thread.yield();
    }
    return result.multiply(intPower(t, xWhole.longValue(), scale)).setScale(scale, BigDecimal.ROUND_HALF_EVEN);
}

From source file:org.cirdles.ambapo.UTMToLatLong.java

/**
 * //from www. j  a va2  s . c om
 * @param xiNorth
 * @param etaEast
 * @param betaSeries
 * @return eta prime
 */
private static BigDecimal calcEtaPrime(BigDecimal xiNorth, BigDecimal etaEast, double[] betaSeries) {

    double xiNorthDouble = xiNorth.doubleValue();
    double etaEastDouble = etaEast.doubleValue();

    BigDecimal cosOfXiNorth;
    BigDecimal sinhOfEtaEast;

    BigDecimal subtrahend = new BigDecimal(0.0);
    int multiplicand = 2;

    for (double beta : betaSeries) {

        cosOfXiNorth = new BigDecimal(Math.cos(multiplicand * xiNorthDouble));
        sinhOfEtaEast = new BigDecimal(Math.sinh(multiplicand * etaEastDouble));

        subtrahend.add(new BigDecimal(beta).multiply(cosOfXiNorth).multiply(sinhOfEtaEast));

        multiplicand += 2;

    }

    BigDecimal etaPrime = etaEast.subtract(subtrahend);

    return etaPrime;

}

From source file:org.csware.ee.utils.Tools.java

public static double subtract(double v1, double v2)

{

    BigDecimal b1 = new BigDecimal(Double.toString(v1));

    BigDecimal b2 = new BigDecimal(Double.toString(v2));

    return b1.subtract(b2).doubleValue();

}

From source file:org.cirdles.ambapo.UTMToLatLong.java

/**
 * //  w  ww  .  j a  v  a 2 s.c o m
 * @param xiNorth
 * @param etaEast
 * @param betaSeries
 * @return xi prime
 */
private static BigDecimal calcXiPrime(BigDecimal xiNorth, BigDecimal etaEast, double[] betaSeries) {

    double xiNorthDouble = xiNorth.doubleValue();
    double etaEastDouble = etaEast.doubleValue();

    BigDecimal sinOfXiNorth;
    BigDecimal coshOfEtaEast;

    BigDecimal subtrahend = new BigDecimal(0.0);
    int multiplicand = 2;

    for (double beta : betaSeries) {

        sinOfXiNorth = new BigDecimal(Math.sin(multiplicand * xiNorthDouble));
        coshOfEtaEast = new BigDecimal(Math.cosh(multiplicand * etaEastDouble));

        subtrahend.add(new BigDecimal(beta).multiply(sinOfXiNorth).multiply(coshOfEtaEast));

        multiplicand += 2;

    }

    BigDecimal xiPrime = xiNorth.subtract(subtrahend);

    return xiPrime;

}

From source file:org.cirdles.ambapo.LatLongToUTM.java

/**
 * Converts BigDecimal latitude longitude to UTM 
 * /*ww  w.j  av a2 s .  c  o m*/
 * @param latitude
 * @param longitude
 * @param datumName
 * @return UTM
 * @throws java.lang.Exception
 * 
 * 
 */
public static UTM convert(BigDecimal latitude, BigDecimal longitude, String datumName) throws Exception {

    Datum datum = Datum.valueOf(datumName);

    BigDecimal meridianRadius = new BigDecimal(datum.getMeridianRadius());
    BigDecimal eccentricity = new BigDecimal(datum.getEccentricity());

    BigDecimal latitudeRadians = latitude.abs().multiply(new BigDecimal(Math.PI)).divide(new BigDecimal(180.0),
            PRECISION, RoundingMode.HALF_UP);

    int zoneNumber = calcZoneNumber(longitude);

    BigDecimal zoneCentralMeridian = calcZoneCentralMeridian(zoneNumber);

    BigDecimal changeInLongitudeDegree = (longitude.subtract(zoneCentralMeridian)).abs().setScale(PRECISION,
            RoundingMode.HALF_UP);

    BigDecimal changeInLongitudeRadians = (changeInLongitudeDegree.multiply(new BigDecimal(Math.PI)))
            .divide(new BigDecimal(180), PRECISION, RoundingMode.HALF_UP);

    BigDecimal conformalLatitude = calcConformalLatitude(eccentricity, latitudeRadians).setScale(PRECISION,
            RoundingMode.HALF_UP);

    BigDecimal tauPrime = (new BigDecimal(Math.tan(conformalLatitude.doubleValue()))).setScale(PRECISION,
            RoundingMode.HALF_UP);

    BigDecimal xiPrimeNorth = calcXiPrimeNorth(changeInLongitudeRadians, tauPrime).setScale(PRECISION,
            RoundingMode.HALF_UP);

    BigDecimal etaPrimeEast = calcEtaPrimeEast(changeInLongitudeRadians, tauPrime).setScale(PRECISION,
            RoundingMode.HALF_UP);

    double[] alphaSeries = datum.getAlphaSeries();

    BigDecimal xiNorth = calcXiNorth(xiPrimeNorth, etaPrimeEast, alphaSeries).setScale(PRECISION,
            RoundingMode.HALF_UP);

    BigDecimal etaEast = calcEtaEast(xiPrimeNorth, etaPrimeEast, alphaSeries).setScale(PRECISION,
            RoundingMode.HALF_UP);

    BigDecimal easting = calcEasting(meridianRadius, etaEast, longitude, zoneCentralMeridian)
            .setScale(PRECISION, RoundingMode.HALF_UP);
    BigDecimal northing = calcNorthing(meridianRadius, xiNorth, latitude).setScale(PRECISION,
            RoundingMode.HALF_UP);

    char zoneLetter = calcZoneLetter(latitude);
    char hemisphere = calcHemisphere(latitude);

    if (easting.doubleValue() > UTM.MAX_EASTING)
        easting = new BigDecimal(UTM.MAX_EASTING);
    if (easting.doubleValue() < UTM.MIN_EASTING)
        easting = new BigDecimal(UTM.MIN_EASTING);

    if (northing.doubleValue() > UTM.MAX_NORTHING)
        northing = new BigDecimal(UTM.MAX_NORTHING);
    if (northing.doubleValue() < UTM.MIN_NORTHING)
        northing = new BigDecimal(UTM.MIN_NORTHING);

    UTM utm = new UTM(easting.setScale(SCALE, RoundingMode.HALF_UP),
            northing.setScale(SCALE, RoundingMode.HALF_UP), hemisphere, zoneNumber, zoneLetter);

    return utm;
}

From source file:org.cirdles.geoapp.LatLongToUTM.java

public static UTM convert(BigDecimal latitude, BigDecimal longitude, String datumName) {

    DatumEnum datumEnum = DatumEnum.valueOf(datumName);
    BigDecimal flattening3D = new BigDecimal(datumEnum.getFlattening3D());
    BigDecimal meridianRadius = new BigDecimal(datumEnum.getMeridianRadius());
    BigDecimal eccentricity = new BigDecimal(datumEnum.getEccentricity());

    BigDecimal latitudeRadians = latitude.abs().multiply(new BigDecimal(Math.PI)).divide(new BigDecimal(180.0),
            precision, RoundingMode.HALF_UP);

    //System.out.println("Latitude Radians: " + latitudeRadians);

    int zoneNumber = calcZoneNumber(longitude);

    BigDecimal zoneCentralMeridian = calcZoneCentralMeridian(zoneNumber);

    BigDecimal changeInLongitudeDegree = (longitude.subtract(zoneCentralMeridian)).abs().setScale(precision,
            RoundingMode.HALF_UP);
    //System.out.println("Change in Long Degree: " + changeInLongitudeDegree);

    BigDecimal changeInLongitudeRadians = (changeInLongitudeDegree.multiply(new BigDecimal(Math.PI)))
            .divide(new BigDecimal(180), precision, RoundingMode.HALF_UP);
    //System.out.println("Change In Longitude Radians: " + changeInLongitudeRadians);

    BigDecimal conformalLatitude = calcConformalLatitude(eccentricity, latitudeRadians).setScale(precision,
            RoundingMode.HALF_UP);
    //System.out.println("Conformal Latitude: " + conformalLatitude);

    BigDecimal tauPrime = (new BigDecimal(Math.tan(conformalLatitude.doubleValue()))).setScale(precision,
            RoundingMode.HALF_UP);
    //System.out.println("Tau Prime: " + tauPrime);

    BigDecimal xiPrimeNorth = calcXiPrimeNorth(changeInLongitudeRadians, tauPrime).setScale(precision,
            RoundingMode.HALF_UP);
    //System.out.println("xi Prime North: " + xiPrimeNorth);

    BigDecimal etaPrimeEast = calcEtaPrimeEast(changeInLongitudeRadians, tauPrime).setScale(precision,
            RoundingMode.HALF_UP);
    //System.out.println("Eta Prime East: " + etaPrimeEast);

    BigDecimal[] alphaSeries = { KrugerSeries.alpha1(flattening3D).setScale(precision, RoundingMode.HALF_UP),
            KrugerSeries.alpha2(flattening3D.setScale(precision, RoundingMode.HALF_UP)),
            KrugerSeries.alpha3(flattening3D).setScale(precision, RoundingMode.HALF_UP),
            KrugerSeries.alpha4(flattening3D).setScale(precision, RoundingMode.HALF_UP),
            KrugerSeries.alpha5(flattening3D).setScale(precision, RoundingMode.HALF_UP),
            KrugerSeries.alpha6(flattening3D).setScale(precision, RoundingMode.HALF_UP),
            KrugerSeries.alpha7(flattening3D).setScale(precision, RoundingMode.HALF_UP) };

    BigDecimal xiNorth = calcXiNorth(xiPrimeNorth, etaPrimeEast, alphaSeries).setScale(precision,
            RoundingMode.HALF_UP);
    //System.out.println("xi North: " + xiNorth);

    BigDecimal etaEast = calcEtaEast(xiPrimeNorth, etaPrimeEast, alphaSeries).setScale(precision,
            RoundingMode.HALF_UP);
    //System.out.println("Eta East: " + etaEast);

    BigDecimal easting = calcEasting(meridianRadius, etaEast, longitude, zoneCentralMeridian)
            .setScale(precision, RoundingMode.HALF_UP);
    BigDecimal northing = calcNorthing(meridianRadius, xiNorth, latitude).setScale(precision,
            RoundingMode.HALF_UP);

    char zoneLetter = calcZoneLetter(latitude);
    char hemisphere = calcHemisphere(latitude);

    return new UTM(easting, northing, hemisphere, zoneNumber, zoneLetter);

}

From source file:eionet.cr.util.Util.java

/**
 * Algorithm calculates the estimated number of hashes.
 *
 * @param minHash/*from   w w w  .j ava2  s .  c o  m*/
 * @param maxHash
 * @return
 */
public static int calculateHashesCount(long minHash, long maxHash) {

    BigDecimal minValue = new BigDecimal(Long.MIN_VALUE);
    BigDecimal maxValue = new BigDecimal(Long.MAX_VALUE);
    BigDecimal lowKey = new BigDecimal(minHash);
    BigDecimal highKey = new BigDecimal(maxHash);
    BigDecimal distance = maxValue.subtract(highKey).add(lowKey).subtract(minValue);
    BigDecimal hitCount = new BigDecimal(2).pow(64).divide(distance, 0, BigDecimal.ROUND_HALF_UP);

    return hitCount.intValue();
}

From source file:org.apache.hive.storage.jdbc.spitter.DecimalIntervalSplitter.java

@Override
public List<MutablePair<String, String>> getIntervals(String lowerBound, String upperBound, int numPartitions,
        TypeInfo typeInfo) {/* w ww  . jav  a  2s .c  o  m*/
    List<MutablePair<String, String>> intervals = new ArrayList<>();
    DecimalTypeInfo decimalTypeInfo = (DecimalTypeInfo) typeInfo;
    int scale = decimalTypeInfo.getScale();
    BigDecimal decimalLower = new BigDecimal(lowerBound);
    BigDecimal decimalUpper = new BigDecimal(upperBound);
    BigDecimal decimalInterval = (decimalUpper.subtract(decimalLower)).divide(new BigDecimal(numPartitions),
            MathContext.DECIMAL64);
    BigDecimal splitDecimalLower, splitDecimalUpper;
    for (int i = 0; i < numPartitions; i++) {
        splitDecimalLower = decimalLower.add(decimalInterval.multiply(new BigDecimal(i))).setScale(scale,
                RoundingMode.HALF_EVEN);
        splitDecimalUpper = decimalLower.add(decimalInterval.multiply(new BigDecimal(i + 1))).setScale(scale,
                RoundingMode.HALF_EVEN);
        if (splitDecimalLower.compareTo(splitDecimalUpper) < 0) {
            intervals.add(new MutablePair<String, String>(splitDecimalLower.toPlainString(),
                    splitDecimalUpper.toPlainString()));
        }
    }
    return intervals;
}

From source file:org.atomspace.ultrahouse3000.translator.Weather2DocumentTranslator.java

@Override
public void process(Exchange exchange) throws Exception {

    JsonObject weather = (JsonObject) new JsonParser().parse(exchange.getIn().getBody(String.class));
    BigDecimal temperatur = weather.get("main").getAsJsonObject().get("temp").getAsBigDecimal();
    temperatur = temperatur.subtract(new BigDecimal("272.15"));
    exchange.getIn().setHeader("temperatur", temperatur);

    super.process(exchange);

}