Example usage for java.math BigDecimal add

Introduction

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

Prototype

public BigDecimal add(BigDecimal augend)

Source Link

Document

Returns a BigDecimal whose value is (this + augend) , and whose scale is max(this.scale(), augend.scale()) .

Usage

From source file:Main.java

public static BigDecimal cosine(BigDecimal x) {

    BigDecimal currentValue = BigDecimal.ONE;
    BigDecimal lastVal = currentValue.add(BigDecimal.ONE);
    BigDecimal xSquared = x.multiply(x);
    BigDecimal numerator = BigDecimal.ONE;
    BigDecimal denominator = BigDecimal.ONE;
    int i = 0;/*from  w  ww .j  a  v  a2 s.c om*/

    while (lastVal.compareTo(currentValue) != 0) {
        lastVal = currentValue;

        int z = 2 * i + 2;

        denominator = denominator.multiply(BigDecimal.valueOf(z));
        denominator = denominator.multiply(BigDecimal.valueOf(z - 1));
        numerator = numerator.multiply(xSquared);

        BigDecimal term = numerator.divide(denominator, SCALE + 5, ROUNDING_MODE);

        if (i % 2 != 0) {
            currentValue = currentValue.add(term);
        } else {
            currentValue = currentValue.subtract(term);
        }
        i++;
    }

    return currentValue;
}

From source file:com.surfs.storage.web.utils.Stringutils.java

public static String sumSpace(String totalSpace, String currentSpace) {
    if (StringUtils.isBlank(totalSpace)) {
        return convertToKB(currentSpace);
    }/*from ww w  .  j  a v  a2  s.co m*/

    //String total = convertToKB(totalSpace);
    String current = convertToKB(currentSpace);
    BigDecimal sum = new BigDecimal(totalSpace);
    long sumNum = sum.add(new BigDecimal(current)).longValue();

    //BigDecimal sumTB = new BigDecimal(sumNum);
    //double divSum = sumTB.divide(new BigDecimal("1048576"), 2, BigDecimal.ROUND_HALF_UP).doubleValue();

    //return String.valueOf(divSum).concat("T");
    return String.valueOf(sumNum);
}

From source file:Main.java

public static BigDecimal sine(BigDecimal x) {
    BigDecimal lastVal = x.add(BigDecimal.ONE);
    BigDecimal currentValue = x;/* w ww .  j  av a 2 s  .  com*/
    BigDecimal xSquared = x.multiply(x);
    BigDecimal numerator = x;
    BigDecimal denominator = BigDecimal.ONE;
    int i = 0;

    while (lastVal.compareTo(currentValue) != 0) {
        lastVal = currentValue;

        int z = 2 * i + 3;

        denominator = denominator.multiply(BigDecimal.valueOf(z));
        denominator = denominator.multiply(BigDecimal.valueOf(z - 1));
        numerator = numerator.multiply(xSquared);

        BigDecimal term = numerator.divide(denominator, SCALE + 5, ROUNDING_MODE);

        if (i % 2 == 0) {
            currentValue = currentValue.subtract(term);
        } else {
            currentValue = currentValue.add(term);
        }

        i++;
    }
    return currentValue;
}

From source file:Main.java

public static BigDecimal sine(BigDecimal x) {
    BigDecimal lastVal = x.add(BigDecimal.ONE);
    BigDecimal currentValue = x;/*from ww w. ja v  a2 s . co m*/
    BigDecimal xSquared = x.multiply(x);
    BigDecimal numerator = x;
    BigDecimal denominator = BigDecimal.ONE;
    int i = 0;

    while (lastVal.compareTo(currentValue) != 0) {
        lastVal = currentValue;

        int z = 2 * i + 3;

        denominator = denominator.multiply(BigDecimal.valueOf(z));
        denominator = denominator.multiply(BigDecimal.valueOf(z - 1));
        numerator = numerator.multiply(xSquared);

        BigDecimal term = numerator.divide(denominator, SCALE + 5, ROUNDING_MODE);

        if (i % 2 != 0) {
            currentValue = currentValue.add(term);
        } else {
            currentValue = currentValue.subtract(term);
        }

        i++;
    }
    return currentValue;
}

From source file:Main.java

public static Double add(Number value1, Number value2) {
    BigDecimal b1 = new BigDecimal(Double.toString(value1.doubleValue()));
    BigDecimal b2 = new BigDecimal(Double.toString(value2.doubleValue()));
    return b1.add(b2).doubleValue();
}

From source file:io.seldon.prediction.VariationPredictionStrategy.java

public static VariationPredictionStrategy build(List<Variation> variations) {
    Map<Range, SimplePredictionStrategy> strategyMap = new LinkedHashMap<>();
    BigDecimal ratioTotal = BigDecimal.ZERO;
    for (Variation var : variations) {
        ratioTotal = ratioTotal.add(var.ratio);
    }// ww  w  . j  av a 2 s .  com
    BigDecimal currentMax = BigDecimal.ZERO;
    for (Variation var : variations) {
        NumberRange range = new NumberRange(currentMax,
                currentMax.add(var.ratio.divide(ratioTotal, 5, BigDecimal.ROUND_UP)));
        strategyMap.put(range, var.variationStrategy);
        currentMax = currentMax.add(var.ratio);
    }
    return new VariationPredictionStrategy(strategyMap);
}

From source file:io.seldon.recommendation.VariationTestingClientStrategy.java

public static VariationTestingClientStrategy build(List<Variation> variations) {
    Map<Range, ClientStrategy> strategyMap = new LinkedHashMap<>();
    BigDecimal ratioTotal = BigDecimal.ZERO;
    for (Variation var : variations) {
        ratioTotal = ratioTotal.add(var.ratio);
    }/*from   ww w  . ja v  a  2 s . co m*/
    BigDecimal currentMax = BigDecimal.ZERO;
    for (Variation var : variations) {
        NumberRange range = new NumberRange(currentMax,
                currentMax.add(var.ratio.divide(ratioTotal, 5, BigDecimal.ROUND_UP)));
        strategyMap.put(range, var.variationStrategy);
        currentMax = currentMax.add(var.ratio);
    }
    return new VariationTestingClientStrategy(strategyMap);
}

From source file:Main.java

/**
 * H = -[0.5 * lg(0.5) + 0.4*lg(0.4) + 0.1*lg(0.1)]
 *//*from   w  w w . j a v a 2  s  .c o m*/
public static BigDecimal calculateEntropy(double... probabilities) {
    BigDecimal res = BigDecimal.ZERO;

    for (double singleProbability : probabilities) {

        BigDecimal singleEntropy = BigDecimal.valueOf(singleProbability)
                .multiply(BigDecimal.valueOf(lg2(singleProbability)));

        res = res.add(singleEntropy);
    }

    return res.negate().setScale(ENTROPY_SCALE, BigDecimal.ROUND_HALF_UP);
}

From source file:Main.java

/**
 * Compute e^x to a given scale by the Taylor series.
 * @param x the value of x//from w  w w  .  ja v a2 s.c o  m
 * @param scale the desired scale of the result
 * @return the result value
 */
private static BigDecimal expTaylor(BigDecimal x, int scale) {
    BigDecimal factorial = BigDecimal.valueOf(1);
    BigDecimal xPower = x;
    BigDecimal sumPrev;

    // 1 + x
    BigDecimal sum = x.add(BigDecimal.valueOf(1));

    // Loop until the sums converge
    // (two successive sums are equal after rounding).
    int i = 2;
    do {
        // x^i
        xPower = xPower.multiply(x).setScale(scale, BigDecimal.ROUND_HALF_EVEN);

        // i!
        factorial = factorial.multiply(BigDecimal.valueOf(i));

        // x^i/i!
        BigDecimal term = xPower.divide(factorial, scale, BigDecimal.ROUND_HALF_EVEN);

        // sum = sum + x^i/i!
        sumPrev = sum;
        sum = sum.add(term);

        ++i;
        Thread.yield();
    } while (sum.compareTo(sumPrev) != 0);

    return sum;
}

From source file:com.spaceprogram.simplejpa.util.AmazonSimpleDBUtil.java

public static String encodeRealNumberRange(BigDecimal number, int maxNumDigits, BigDecimal offsetValue) {
    BigDecimal offsetNumber = number.add(offsetValue);
    String longString = offsetNumber.toString();
    int numZeroes = maxNumDigits - longString.length();
    StringBuffer strBuffer = new StringBuffer(numZeroes + longString.length());
    for (int i = 0; i < numZeroes; i++) {
        strBuffer.insert(i, '0');
    }//from w ww  .  ja va  2s . c  om
    strBuffer.append(longString);
    return strBuffer.toString();
}