Example usage for java.math BigDecimal negate

Introduction

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

Prototype

public BigDecimal negate() 

Source Link

Document

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

Usage

From source file:Main.java

public static void main(String[] argv) throws Exception {
    BigDecimal bd1 = new BigDecimal("123456789.0123456890");

    bd1 = bd1.negate();

}

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From source file:Main.java

public static void main(String[] args) {

    BigDecimal bg1 = new BigDecimal("12.1234");

    BigDecimal bg2 = bg1.negate();

    System.out.println(bg2);/*  w  w  w .jav  a  2 s  .c o  m*/
}

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From source file:Main.java

public static void main(String[] argv) throws Exception {

    // Create via a string
    BigDecimal bd1 = new BigDecimal("123456789.0123456890");

    // Create via a long
    BigDecimal bd2 = BigDecimal.valueOf(123L);

    bd1 = bd1.add(bd2);/*from   w w  w  .  j  a  va2s .co m*/
    bd1 = bd1.multiply(bd2);
    bd1 = bd1.subtract(bd2);
    bd1 = bd1.divide(bd2, BigDecimal.ROUND_UP);
    bd1 = bd1.negate();
}

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From source file:Main.java

public static void main(String[] args) {
    BigDecimal decimalA = new BigDecimal("123456789012345");
    BigDecimal decimalB = new BigDecimal("10");

    decimalA = decimalA.add(decimalB);/*w ww.j  a  va 2 s .c  om*/
    System.out.println("decimalA = " + decimalA);

    decimalA = decimalA.multiply(decimalB);
    System.out.println("decimalA = " + decimalA);

    decimalA = decimalA.subtract(decimalB);
    System.out.println("decimalA = " + decimalA);

    decimalA = decimalA.divide(decimalB);
    System.out.println("decimalA = " + decimalA);

    decimalA = decimalA.pow(2);
    System.out.println("decimalA = " + decimalA);

    decimalA = decimalA.negate();
    System.out.println("decimalA = " + decimalA);
}

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From source file:Main.java

public static Date getDateFromRank(BigDecimal rank) {
    return new Date(rank.negate().scaleByPowerOfTen(3).longValue());
}

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From source file:Util.java

public static BigDecimal[] quadratic(BigDecimal a, BigDecimal b, BigDecimal c, RoundingMode rounding) {
    // ax^2 + bx + c = 0
    BigDecimal part1 = b.negate();
    BigDecimal part2 = sqrt(b.multiply(b).subtract(BigDecimalFOUR.multiply(a).multiply(c)), rounding);
    BigDecimal part3 = BigDecimalTWO.multiply(a);
    BigDecimal[] toRet = new BigDecimal[2];
    toRet[0] = (part1.subtract(part2)).divide(part3, RoundingMode.CEILING);
    toRet[1] = (part1.add(part2)).divide(part3, RoundingMode.CEILING);
    return toRet;
}

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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);
}

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From source file:Main.java

/**
 * Compute e^x to a given scale.//from  w ww .  j  a va  2  s.c om
 * Break x into its whole and fraction parts and
 * compute (e^(1 + fraction/whole))^whole using Taylor's formula.
 * @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);
}

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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.
 * // w ww.j a v  a2s . c  o  m
 * @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);
}

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From source file:jgnash.ui.report.compiled.MonthlyAccountBalanceChartCompare.java

private static BigDecimal totalModulus(BigDecimal amount, final AccountType type) {
    if (type == AccountType.INCOME || type == AccountType.EQUITY || type == AccountType.CREDIT
            || type == AccountType.LIABILITY) {
        return amount.negate();
    }/*from w  w  w.j av a2 s .  c  o m*/

    return amount;
}

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