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

public static double round(double d) {
    if (Double.isNaN(d) || Double.isInfinite(d))
        return d;
    int digits = leadingDigits(d);
    int roundToDecimal = Math.min(MAXDIGIT - digits, MAXDECIMAL);
    double rounded = BigDecimal.valueOf(d).setScale(roundToDecimal, BigDecimal.ROUND_HALF_UP).doubleValue();
    return rounded;
}

---

From source file:Main.java

public static BigDecimal atan(BigDecimal val) {
    return BigDecimal.valueOf(Math.atan(val.doubleValue()));
}

---

From source file:Main.java

public static BigDecimal acos(BigDecimal val) {
    return BigDecimal.valueOf(Math.acos(val.doubleValue()));
}

---

From source file:Main.java

public static BigDecimal asin(BigDecimal val) {
    return BigDecimal.valueOf(Math.asin(val.doubleValue()));
}

---

From source file:BigDSqrt.java

public static BigDecimal sqrt(BigDecimal n, int s) {
    BigDecimal TWO = BigDecimal.valueOf(2);

    // Obtain the first approximation
    BigDecimal x = n.divide(BigDecimal.valueOf(3), s, BigDecimal.ROUND_DOWN);
    BigDecimal lastX = BigDecimal.valueOf(0);

    // Proceed through 50 iterations
    for (int i = 0; i < 50; i++) {
        x = n.add(x.multiply(x)).divide(x.multiply(TWO), s, BigDecimal.ROUND_DOWN);
        if (x.compareTo(lastX) == 0)
            break;
        lastX = x;/*from  w w w  .j  a v  a2  s  . co m*/
    }
    return x;
}

---

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//from  w  w  w  .  ja v a 2  s . com
 * @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;
}

---

From source file:Main.java

/**
 * Get the given value in satoshis as a string on the form "10.12345000".
 * <p>/* www .j a  va2  s  .co  m*/
 * This method always returns a string with 8 decimal points. If you only
 * wish to have the necessary digits use {@link CoinUtil#valueString(long)}
 * 
 * @param value
 *           The number of satoshis
 * @return The given value in satoshis as a string on the form "10.12345000".
 */
public static String fullValueString(long value) {
    BigDecimal d = BigDecimal.valueOf(value);
    d = d.movePointLeft(8);
    return d.toPlainString();
}

---

From source file:Main.java

private static void setterValue(PropertyDescriptor property, Object mapValue, Object object)
        throws InvocationTargetException, IllegalAccessException, ParseException {
    Method setter = property.getWriteMethod();
    if (mapValue == null) {
        setter.invoke(object, mapValue);
        return;/*from w w w .  j  a  va 2 s.  com*/
    }

    Class propertyType = property.getPropertyType();
    String type = propertyType.getName();
    String value = mapValue.toString();

    if (type.equals("java.lang.String")) {
        setter.invoke(object, value);
    } else if (type.equals("java.lang.Integer")) {
        setter.invoke(object, Integer.parseInt(value));
    } else if (type.equals("java.lang.Long")) {
        setter.invoke(object, Long.parseLong(value));
    } else if (type.equals("java.math.BigDecimal")) {
        setter.invoke(object, BigDecimal.valueOf(Double.parseDouble(value)));
    } else if (type.equals("java.math.BigInteger")) {
        setter.invoke(object, BigInteger.valueOf(Long.parseLong(value)));
    } else if (type.equals("java.util.Date")) {
        setter.invoke(object, new SimpleDateFormat("yyyy-MM-dd HH:mm:ss").parse(value));
    } else if (type.equals("java.lang.Boolean")) {
        setter.invoke(object, Boolean.valueOf(value));
    } else if (type.equals("java.lang.Float")) {
        setter.invoke(object, Float.parseFloat(value));
    } else if (type.equals("java.lang.Double")) {
        setter.invoke(object, Double.parseDouble(value));
    } else if (type.equals("java.lang.byte[]")) {
        setter.invoke(object, value.getBytes());
    } else {
        setter.invoke(object, value);
    }
}

---

From source file:Main.java

/**
 * Get the given value in satoshis as a string on the form "10.12345".
 * <p>/*from w ww  . j ava 2 s  .  c  o m*/
 * This method only returns necessary decimal points to tell the exact value.
 * If you wish to have all 8 digits use
 * {@link CoinUtil#fullValueString(long)}
 * 
 * @param value
 *           The number of satoshis
 * @return The given value in satoshis as a string on the form "10.12345".
 */
public static String valueString(long value) {
    BigDecimal d = BigDecimal.valueOf(value);
    d = d.divide(ONE_BTC_IN_SATOSHIS);
    return d.toPlainString();
}

---

From source file:Main.java

/**
 * Compute e^x to a given scale.// ww w . j a v a2 s. c o  m
 * 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);
}

---

• «
• 1
• 2
• 3
• 4
• 5
• 6
• 7
• 8
• 9
• 10
• 11
• 12
• 13
• 14
• 15
• 16
• 17
• 18
• 19
• 20
• 21
• 22
• 23
• 24
• 25
• 26
• 27
• 28
• 29
• 30
• 31
• 32
• 33
• 34
• 35
• 36
• 37
• 38
• 39
• 40
• 41
• 42
• 43
• 44
• 45
• 46
• 47
• 48
• 49
• »