Example usage for java.math BigInteger abs

Introduction

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

Prototype

public BigInteger abs() 

Source Link

Document

Returns a BigInteger whose value is the absolute value of this BigInteger.

Usage

From source file:Main.java

public static void main(String[] args) {

    BigInteger bi1 = new BigInteger("123");
    BigInteger bi2 = new BigInteger("-123");

    // assign absolute values of bi1, bi2 to bi3, bi4
    BigInteger bi3 = bi1.abs();
    BigInteger bi4 = bi2.abs();//  w w  w . j  av a2  s . c  om

    System.out.println(bi3);
    System.out.println(bi4);
}

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From source file:com.facebook.infrastructure.utils.FBUtilities.java

public static BigInteger hash(String data) {
    byte[] result = hash(HashingSchemes.SHA1, data.getBytes());
    BigInteger hash = new BigInteger(result);
    return hash.abs();
}

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From source file:com.bigdata.dastor.utils.FBUtilities.java

public static BigInteger hash(String data) {
    byte[] result = hash("MD5", data.getBytes());
    BigInteger hash = new BigInteger(result);
    return hash.abs();
}

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From source file:com.stratio.cassandra.lucene.schema.mapping.BigIntegerMapper.java

/** {@inheritDoc} */
@Override//from   w w w .  j  a v a2 s  .  co  m
protected String doBase(String name, Object value) {

    // Parse big decimal
    String svalue = value.toString();
    BigInteger bi;
    try {
        bi = new BigInteger(svalue);
    } catch (NumberFormatException e) {
        throw new IndexException("Field '%s' requires a base 10 integer, but found '%s'", name, svalue);
    }

    // Check size
    if (bi.abs().toString().length() > digits) {
        throw new IndexException("Field '%s' with value '%s' has more than %d digits", name, value, digits);
    }

    // Map
    bi = bi.add(complement);
    String bis = encode(bi);
    return StringUtils.leftPad(bis, hexDigits + 1, '0');
}

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From source file:com.stratio.cassandra.index.schema.ColumnMapperBigInteger.java

/** {@inheritDoc} */
@Override//  ww  w  .  j  a v  a 2s. c  o  m
public String indexValue(String name, Object value) {

    // Check not null
    if (value == null) {
        return null;
    }

    // Parse big decimal
    String svalue = value.toString();
    BigInteger bi;
    try {
        bi = new BigInteger(svalue);
    } catch (NumberFormatException e) {
        String message = String.format("Field %s requires a base 10 integer, but found \"%s\"", name, svalue);
        throw new IllegalArgumentException(message);
    }

    // Check size
    if (bi.abs().toString().length() > digits) {
        throw new IllegalArgumentException("Value has more than " + digits + " digits");
    }

    // Map
    bi = bi.add(complement);
    String bis = encode(bi);
    return StringUtils.leftPad(bis, hexDigits + 1, '0');
}

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From source file:burstcoin.observer.service.AssetService.java

private String convertPrice(String priceString, int decimals) {
    BigInteger price = new BigInteger(priceString);
    BigInteger amount = price.multiply(new BigInteger("" + (long) Math.pow(10, decimals)));
    String negative = "";
    String afterComma = "";
    String fractionalPart = amount.mod(new BigInteger("100000000")).toString();
    amount = amount.divide(new BigInteger("100000000"));
    if (amount.compareTo(BigInteger.ZERO) < 0) {
        amount = amount.abs();
        negative = "-";
    }//  w w  w. j  ava  2  s  . c  o m
    if (!fractionalPart.equals("0")) {
        afterComma = ".";
        for (int i = fractionalPart.length(); i < 8; i++) {
            afterComma += "0";
        }
        afterComma += fractionalPart.replace("0+$", "");
    }
    String result = negative + amount + afterComma;
    while (result.lastIndexOf("0") == result.length() - 1 && result.contains(".")) {
        result = result.substring(0, result.length() - 1);
    }
    if (result.lastIndexOf(".") == result.length() - 1) {
        result = result.substring(0, result.length() - 1);
    }
    return result;
}

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From source file:net.pms.util.Rational.java

/**
 * Calculates the greatest common divisor for two {@link BigInteger}s using
 * {@link BigInteger#gcd}.//  w ww .  ja  v a 2 s . com
 *
 * @param u the first number.
 * @param v the second number.
 * @return The GDC, always 1 or greater.
 */
@Nullable
public static BigInteger calculateGreatestCommonDivisor(@Nullable BigInteger u, @Nullable BigInteger v) {
    if (u == null || v == null) {
        return null;
    }
    if (u.abs().compareTo(BigInteger.ONE) <= 0 || v.abs().compareTo(BigInteger.ONE) <= 0) {
        return BigInteger.ONE;
    }
    return u.gcd(v);
}

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From source file:net.pms.util.Rational.java

/**
 * Calculates the least common multiple for two {@link BigInteger}s using the formula
 * {@code u * v / gcd(u, v)} where {@code gcd} is the greatest common divisor for the two.
 *
 * @param u the first number.//from   ww w.jav a  2s  . co  m
 * @param v the second number.
 * @return The LCM, always 1 or greater.
 */
@Nullable
public static BigInteger calculateLeastCommonMultiple(@Nullable BigInteger u, @Nullable BigInteger v) {
    if (u == null || v == null) {
        return null;
    }
    if (u.signum() == 0 && v.signum() == 0) {
        return BigInteger.ONE;
    }
    u = u.abs();
    v = v.abs();
    if (u.signum() == 0) {
        return v;
    }
    if (v.signum() == 0) {
        return u;
    }
    return u.divide(calculateGreatestCommonDivisor(u, v)).multiply(v);
}

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From source file:net.pms.util.Rational.java

/**
 * Returns a {@link Rational} whose value is {@code (this / value)}.
 *
 * @param value the value by which this {@link Rational} is to be divided.
 * @return The division result./*from w w  w  . ja  v  a 2 s .c om*/
 */
@Nullable
public Rational divide(@Nullable BigInteger value) {
    if (value == null) {
        return null;
    }
    if (isNaN()) {
        return NaN;
    }

    if (value.signum() == 0) {
        if (signum() == 0) {
            return NaN;
        }
        return signum() > 0 ? POSITIVE_INFINITY : NEGATIVE_INFINITY;
    }

    if (signum() == 0 || isInfinite() || BigInteger.ONE.equals(value.abs())) {
        return value.signum() < 0 ? negate() : this;
    }

    // Keep the sign in the numerator and the denominator positive
    if (value.signum() < 0) {
        return valueOf(reducedNumerator.negate(), reducedDenominator.multiply(value.negate()));
    }
    return valueOf(reducedNumerator, reducedDenominator.multiply(value));
}

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From source file:net.pms.util.Rational.java

/**
 * Returns a {@link Rational} whose value is {@code (this * value)}.
 *
 * @param value the value to be multiplied by this {@link Rational}.
 * @return The multiplication result.// ww  w .  j  a va  2  s  .  c  om
 */
@Nullable
public Rational multiply(@Nullable BigInteger value) {
    if (value == null) {
        return null;
    }
    if (isNaN()) {
        return NaN;
    }
    if (isInfinite()) {
        if (value.signum() == 0) {
            return NaN; // Infinity by zero
        }
        return numerator.signum() == value.signum() ? POSITIVE_INFINITY : NEGATIVE_INFINITY;
    }
    if (value.signum() == 0) {
        return ZERO;
    }

    if (BigInteger.ONE.equals(value.abs())) {
        return value.signum() < 0 ? negate() : this;
    }

    return valueOf(reducedNumerator.multiply(value), reducedDenominator);
}

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