Example usage for java.math BigDecimal ZERO

Introduction

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

Prototype

BigDecimal ZERO

To view the source code for java.math BigDecimal ZERO.

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Document

The value 0, with a scale of 0.

Usage

From source file:Main.java

/**
 * Divides two decimals and applies the given scale and a ROUND_HALF_UP. This method should be used only for the final result
 * calculation. For example if we have something like this: (axb)/c the rules should be applied to the result of the division
 * only and not all the computations that give us the final result.
 * //from   w  ww . j a v a2s  .  c o m
 * @param dividend the dividend
 * @param divisor the divisor
 * @param scale the scale for the result
 * @return the result of the division after the scale and rounding are applied
 */
public static BigDecimal divide(BigDecimal dividend, BigDecimal divisor, int scale) {

    BigDecimal result = BigDecimal.ZERO;

    if (dividend != null && divisor != null && !divisor.equals(BigDecimal.ZERO)) {
        result = dividend.divide(divisor, scale, BigDecimal.ROUND_HALF_UP);
    }

    return result;
}

From source file:Main.java

/**
 * Multiplies two decimals and applies the given scale and a ROUND_HALF_UP. This method should be used only for the final result
 * calculation.For example if we have something like this: (axb)/c the rules should be applied to the result of the division
 * only and not all the computations that give us the final result.
 * //from  w w  w .  j  av a 2s . co m
 * @param multiplier1 first multiplier
 * @param multiplier2 second multiplier
 * @param scale the scale fo the result
 * @return the result of the multiplication after scale and rounding are applied
 */
public static BigDecimal multiply(BigDecimal multiplier1, BigDecimal multiplier2, int scale) {

    BigDecimal result = BigDecimal.ZERO;

    if (multiplier1 != null && multiplier2 != null) {
        result = multiplier1.multiply(multiplier2);
    }

    result = result.setScale(scale, BigDecimal.ROUND_HALF_UP);
    return result;
}

From source file:Main.java

@NonNull
public static BigDecimal getNonNull(BigDecimal value) {
    return getNonNull(value, BigDecimal.ZERO);
}

From source file:Main.java

public static BigDecimal log10(BigDecimal b) {
    final int NUM_OF_DIGITS = SCALE + 2;
    // need to add one to get the right number of dp
    //  and then add one again to get the next number
    //  so I can round it correctly.

    MathContext mc = new MathContext(NUM_OF_DIGITS, RoundingMode.HALF_EVEN);
    //special conditions:
    // log(-x) -> exception
    // log(1) == 0 exactly;
    // log of a number lessthan one = -log(1/x)
    if (b.signum() <= 0) {
        throw new ArithmeticException("log of a negative number! (or zero)");
    } else if (b.compareTo(BigDecimal.ONE) == 0) {
        return BigDecimal.ZERO;
    } else if (b.compareTo(BigDecimal.ONE) < 0) {
        return (log10((BigDecimal.ONE).divide(b, mc))).negate();
    }/*from   w w w.  ja  v a2  s. com*/

    StringBuilder sb = new StringBuilder();
    //number of digits on the left of the decimal point
    int leftDigits = b.precision() - b.scale();

    //so, the first digits of the log10 are:
    sb.append(leftDigits - 1).append(".");

    //this is the algorithm outlined in the webpage
    int n = 0;
    while (n < NUM_OF_DIGITS) {
        b = (b.movePointLeft(leftDigits - 1)).pow(10, mc);
        leftDigits = b.precision() - b.scale();
        sb.append(leftDigits - 1);
        n++;
    }

    BigDecimal ans = new BigDecimal(sb.toString());

    //Round the number to the correct number of decimal places.
    ans = ans.round(new MathContext(ans.precision() - ans.scale() + SCALE, RoundingMode.HALF_EVEN));
    return ans;
}

From source file:Main.java

public static BigDecimal log10(BigDecimal b) {
    final int NUM_OF_DIGITS = SCALE + 2;
    // need to add one to get the right number of dp
    // and then add one again to get the next number
    // so I can round it correctly.

    MathContext mc = new MathContext(NUM_OF_DIGITS, RoundingMode.HALF_EVEN);
    // special conditions:
    // log(-x) -> exception
    // log(1) == 0 exactly;
    // log of a number lessthan one = -log(1/x)
    if (b.signum() <= 0) {
        throw new ArithmeticException("log of a negative number! (or zero)");
    } else if (b.compareTo(BigDecimal.ONE) == 0) {
        return BigDecimal.ZERO;
    } else if (b.compareTo(BigDecimal.ONE) < 0) {
        return (log10((BigDecimal.ONE).divide(b, mc))).negate();
    }/*from w ww  .j ava 2s .  c o  m*/

    StringBuilder sb = new StringBuilder();
    // number of digits on the left of the decimal point
    int leftDigits = b.precision() - b.scale();

    // so, the first digits of the log10 are:
    sb.append(leftDigits - 1).append(".");

    // this is the algorithm outlined in the webpage
    int n = 0;
    while (n < NUM_OF_DIGITS) {
        b = (b.movePointLeft(leftDigits - 1)).pow(10, mc);
        leftDigits = b.precision() - b.scale();
        sb.append(leftDigits - 1);
        n++;
    }

    BigDecimal ans = new BigDecimal(sb.toString());

    // Round the number to the correct number of decimal places.
    ans = ans.round(new MathContext(ans.precision() - ans.scale() + SCALE, RoundingMode.HALF_EVEN));
    return ans;
}

From source file:com.ebay.cloud.cms.service.resources.impl.MetadataValidator.java

public static void validateNumber(Number value, String key) {
    if (value != null) {
        CheckConditions.checkArgument(new BigDecimal(value.toString()).compareTo(BigDecimal.ZERO) > 0,
                "Configuration value must be greater than 0 for configuration item %s!", key);
    }/*w  w  w  .j  a  va2s  . co m*/
}

From source file:com.qcadoo.model.api.BigDecimalUtils.java

/**
 * Converts value, if null returns zero//from w w w  . j a va2  s  . c om
 * 
 * @param value
 *            value
 * 
 * @return value or zero
 */
public static BigDecimal convertNullToZero(final Object value) {
    if (value == null) {
        return BigDecimal.ZERO;
    }
    if (value instanceof BigDecimal) {
        return (BigDecimal) value;
    }
    return BigDecimal.valueOf(Double.valueOf(value.toString()));
}

From source file:fr.francetelecom.callback.ItemReaderFooter.java

@Override
public void write(List<? extends Report> items) throws Exception {
    BigDecimal chunkTotal = BigDecimal.ZERO;
    for (Report report : items) {
        System.out.println("footer : " + report);
    }/*from w  w w.jav a  2 s  .  com*/

    delegate.write(items);

    // After successfully writing all items
    totalAmount = totalAmount.add(chunkTotal);
}

From source file:com.stitchgalaxy.domain.service.SitchGalaxyService.java

@Transactional(rollbackFor = Exception.class)
public void addProduct() {
    Product p = new Product();
    p.setBlocked(Boolean.TRUE);/*from w  w  w.j a v a2  s . com*/
    p.setPrice(BigDecimal.ZERO);
    p.setDate(new LocalDate(2014, 1, 1));
    productRepository.save(p);
}

From source file:com.github.fge.jsonschema.keyword.digest.helpers.NumericDigester.java

private static boolean valueIsLong(final JsonNode node) {
    if (!node.canConvertToLong())
        return false;

    if (NodeType.getNodeType(node) == NodeType.INTEGER)
        return true;

    return node.decimalValue().remainder(BigDecimal.ONE).compareTo(BigDecimal.ZERO) == 0;
}