Example usage for java.math BigDecimal BigDecimal

Introduction

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

Prototype

public BigDecimal(long val)

Source Link

Document

Translates a long into a BigDecimal .

Usage

From source file:Main.java

/**
 * Round double value with low error/*from w  w w  .j  a  v  a2s .c  o m*/
 *
 * @param value  Value
 * @param places decimal
 * @return double
 */
static double round(double value, int places) {
    // check if places below 0
    places = Math.max(0, places);
    BigDecimal bd = new BigDecimal(value);
    bd = bd.setScale(places, RoundingMode.HALF_UP);
    return bd.doubleValue();
}

From source file:Main.java

public static double sub(float v1, float v2) {
    BigDecimal b1 = new BigDecimal(Float.toString(v1));
    BigDecimal b2 = new BigDecimal(Float.toString(v2));
    return b1.subtract(b2).doubleValue();
}

From source file:Main.java

public static String getFormatSize(double size) {
    double kiloByte = size / 1024;
    if (kiloByte < 1) {
        return size + "B";
    }/*from   w w w.  j a va2  s .c  om*/

    double megaByte = kiloByte / 1024;
    if (megaByte < 1) {
        BigDecimal result1 = new BigDecimal(Double.toString(kiloByte));
        return result1.setScale(2, BigDecimal.ROUND_HALF_UP).toPlainString() + "KB";
    }

    double gigaByte = megaByte / 1024;
    if (gigaByte < 1) {
        BigDecimal result2 = new BigDecimal(Double.toString(megaByte));
        return result2.setScale(2, BigDecimal.ROUND_HALF_UP).toPlainString() + "MB";
    }

    double teraBytes = gigaByte / 1024;
    if (teraBytes < 1) {
        BigDecimal result3 = new BigDecimal(Double.toString(gigaByte));
        return result3.setScale(2, BigDecimal.ROUND_HALF_UP).toPlainString() + "GB";
    }
    BigDecimal result4 = new BigDecimal(teraBytes);
    return result4.setScale(2, BigDecimal.ROUND_HALF_UP).toPlainString() + "TB";
}

From source file:Main.java

/**
 * Rounds a double via passed in amount and places
 * @param value//from   w  w  w  .j  av a 2s. c o  m
 * @param places
 * @return
 */
public static double round(double value, int places) {
    if (places < 0)
        throw new IllegalArgumentException();

    BigDecimal bd = new BigDecimal(value);
    bd = bd.setScale(places, RoundingMode.HALF_UP);
    return bd.doubleValue();
}

From source file:Main.java

public static final BigDecimal castToBigDecimal(Object paramObject) {
    if (paramObject == null) {
        return null;
    }/*from   ww  w  .ja  v a 2  s.  com*/
    if ((paramObject instanceof BigDecimal)) {
        return (BigDecimal) paramObject;
    }
    if ((paramObject instanceof BigInteger)) {
        return new BigDecimal((BigInteger) paramObject);
    }
    String str = paramObject.toString();
    if (str.length() == 0) {
        return null;
    }
    return new BigDecimal(str);
}

From source file:Main.java

/**
 * Rounds a double up via passed in amount and places
 * @param value//www  .j a  v  a  2  s . co m
 * @param places
 * @return
 */
public static double roundUp(double value, int places) {
    if (places < 0)
        throw new IllegalArgumentException();

    BigDecimal bd = new BigDecimal(value);
    bd = bd.setScale(places, RoundingMode.CEILING);
    return bd.doubleValue();
}

From source file:Main.java

/**
 * Rounds a double down via passed in amount and places
 * @param value//www.j  a  v  a2  s  . com
 * @param places
 * @return
 */
public static double roundDown(double value, int places) {
    if (places < 0)
        throw new IllegalArgumentException();

    BigDecimal bd = new BigDecimal(value);
    bd = bd.setScale(places, RoundingMode.FLOOR);
    return bd.doubleValue();
}

From source file:MathUtils.java

public static BigDecimal getBigDecimal(Object value) {
    BigDecimal ret = null;/*w  ww . j  a  va 2  s.  c  om*/
    if (value != null) {
        if (value instanceof BigDecimal) {
            ret = (BigDecimal) value;
        } else if (value instanceof String) {
            ret = new BigDecimal((String) value);
        } else if (value instanceof BigInteger) {
            ret = new BigDecimal((BigInteger) value);
        } else if (value instanceof Number) {
            ret = new BigDecimal(((Number) value).doubleValue());
        } else {
            throw new ClassCastException("Not possible to coerce [" + value + "] from class " + value.getClass()
                    + " into a BigDecimal.");
        }
    }
    return ret;
}

From source file:Main.java

/**
 * Returns a string representation of number rounded to given number of
 * significant figures//  w  ww . j  a v  a2s .  c o  m
 *
 * @param value
 * @param significantFigures
 * @return String.
 */
public static String roundToString(double value, int significantFigures) {
    MathContext mc = new MathContext(significantFigures);
    BigDecimal num = new BigDecimal(value);
    return num.round(mc).toPlainString();
}

From source file:Main.java

public static BigDecimal getNumeric(byte[] ar) throws Exception {
    BigDecimal res = new BigDecimal("0");

    String s = getHexString(ar);//from  www  .ja  v a 2s  .  c o  m
    int len = s.length();
    s = s.substring(0, len - 5) + "." + s.substring(len - 5, len - 1);
    if (ar[ar.length - 1] == 13)
        s = "-" + s;

    res = new BigDecimal(s);
    return res;
}