Example usage for java.math BigDecimal valueOf

Introduction

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

Prototype

public static BigDecimal valueOf(double val) 

Source Link

Document

Translates a double into a BigDecimal , using the double 's canonical string representation provided by the Double#toString(double) method.

Usage

From source file:Main.java

/**
 * Compute x^exponent to a given scale. Uses the same algorithm as class
 * numbercruncher.mathutils.IntPower./*from  w ww.  j  av a  2s . c om*/
 * 
 * @param x
 *            the value x
 * @param exponent
 *            the exponent value
 * @param scale
 *            the desired scale of the result
 * @return the result value
 */
public static BigDecimal intPower(BigDecimal x, long exponent, int scale) {
    // If the exponent is negative, compute 1/(x^-exponent).
    if (exponent < 0) {
        return BigDecimal.valueOf(1).divide(intPower(x, -exponent, scale), scale, BigDecimal.ROUND_HALF_EVEN);
    }

    BigDecimal power = BigDecimal.valueOf(1);

    // Loop to compute value^exponent.
    while (exponent > 0) {

        // Is the rightmost bit a 1?
        if ((exponent & 1) == 1) {
            power = power.multiply(x).setScale(scale, BigDecimal.ROUND_HALF_EVEN);
        }

        // Square x and shift exponent 1 bit to the right.
        x = x.multiply(x).setScale(scale, BigDecimal.ROUND_HALF_EVEN);
        exponent >>= 1;

        Thread.yield();
    }

    return power;
}

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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;//w  w w .  j a v a 2 s  .  c o m

    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.subtract(term);
        } else {
            currentValue = currentValue.add(term);
        }
        i++;
    }

    return currentValue;
}

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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;/*www.j av  a 2  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:Main.java

public static BigDecimal sine(BigDecimal x) {
    BigDecimal lastVal = x.add(BigDecimal.ONE);
    BigDecimal currentValue = x;//from w  w  w .  j av a  2s .  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.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 w w w. j a v a 2s  .  c  om
    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

/**
 * 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.
 * //from   w  ww  . java 2s .  co  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);
}

---

From source file:com.spring.tutorial.mvc.controller.SampleController.java

@RequestMapping("conversion")
public String conversionSample(Model model) {
    Foo foo = new Foo("This is a bar");
    foo.setDate(new Date());
    foo.setDecimal(BigDecimal.valueOf(10558.45));
    model.addAttribute(foo);/*from   ww w . j a  v  a  2s.c  o m*/
    return "views/conversion";
}

---

From source file:edu.mum.waa.webstore.repository.impl.InMemoryProdudctRepository.java

public InMemoryProdudctRepository() {
    listOfProducts = new ArrayList<>();
    Product p2 = new Product("iphone123", "iphone 6", BigDecimal.valueOf(600));
    p2.setDescription("This is best");
    p2.setCategory("iphone");
    p2.setManufacturer("apple");
    p2.setUnitsInStock(100);/*  ww  w. j  a v a2s.  c om*/
    listOfProducts.add(p2);
    Product p1 = new Product("iphone123", "iphone 6s", BigDecimal.valueOf(770));
    p1.setDescription("This is best best best");
    p1.setCategory("iphone iphone");
    p1.setManufacturer("apple apple");
    p1.setUnitsInStock(120);
    listOfProducts.add(p1);
}

---

From source file:edu.mum.waa.webstore.repository.impl.InMemoryProductRepository.java

public InMemoryProductRepository() {
    listOfProduct = new ArrayList<>();

    Product iPhone = new Product("P1234", "iPhone", BigDecimal.valueOf(499));
    iPhone.setDescription("iPhone 7");
    iPhone.setCategory("Smart Phone");
    iPhone.setManufacturer("Apple");
    iPhone.setUnitsInStock(100);/*w ww  .  j  av  a  2 s  .c om*/

    Product nexus7 = new Product("P1235", "Nexus 7", BigDecimal.valueOf(350));
    nexus7.setDescription("Nexus 7 tablet");
    nexus7.setCategory("Tablet");
    nexus7.setManufacturer("Asus");
    nexus7.setUnitsInStock(500);

    Product dellLatitude = new Product("P1236", "Dell Latitude", BigDecimal.valueOf(700));
    dellLatitude.setDescription("Dell latitude laptop");
    dellLatitude.setCategory("Laptop");
    dellLatitude.setManufacturer("Dell");
    dellLatitude.setUnitsInStock(50);

    listOfProduct.add(iPhone);
    listOfProduct.add(nexus7);
    listOfProduct.add(dellLatitude);

}

---

From source file:de.tsystems.mms.apm.performancesignature.util.PerfSigUIUtils.java

public static BigDecimal round(final double d, final int scale) {
    try {//  w  w  w  . j a v a  2s. co  m
        return BigDecimal.valueOf(d).setScale(d % 1 == 0 ? 0 : scale, BigDecimal.ROUND_HALF_UP);
    } catch (NumberFormatException ex) {
        if (Double.isInfinite(d)) {
            return BigDecimal.valueOf(d);
        } else {
            return BigDecimal.ZERO;
        }
    }
}

---

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