Example usage for java.lang Double toString

Introduction

In this page you can find the example usage for java.lang Double toString.

Prototype

public static String toString(double d)

Source Link

Document

Returns a string representation of the double argument.

Usage

From source file:Main.java

public static String doubleToString(double value) {
    return Double.toString(Math.floor(value * 10000.0 + 0.5) / 10000.0);
}

From source file:Main.java

/**
 * This used when a double ends in 0 (IE 100.0) and you want 2 decimal places instead (IE 100.00)
 * @param value The double to convert/*ww w .ja v  a  2  s .com*/
 * @param addDollarSign boolean, if null passed, nothing, if true passed, will add
 *                      a $ to the begining
 * @return A String, formatted correctly. Will look like this: 104.44 or $99.40
 */
public static String convertDoubleToStringAddZeroNoRemove(double value, Boolean addDollarSign) {
    String str = Double.toString(value);
    String ending = str.substring((str.length() - 2), (str.length() - 1));
    if (ending.equalsIgnoreCase(".")) {
        str = str + "0";
    }
    if (addDollarSign != null) {
        if (addDollarSign) {
            str = "$" + str;
        }
    }
    return str;
}

From source file:Main.java

public static double mul(double v1, double v2) {
    BigDecimal b1 = new BigDecimal(Double.toString(v1));
    BigDecimal b2 = new BigDecimal(Double.toString(v2));
    return b1.multiply(b2).setScale(2, BigDecimal.ROUND_HALF_UP).doubleValue();
}

From source file:Main.java

public static double add(double v1, double v2) {
    BigDecimal b1 = new BigDecimal(Double.toString(v1));
    BigDecimal b2 = new BigDecimal(Double.toString(v2));
    return b1.add(b2).setScale(2, BigDecimal.ROUND_HALF_UP).doubleValue();
}

From source file:Main.java

public static double sub(double v1, double v2) {
    BigDecimal b1 = new BigDecimal(Double.toString(v1));
    BigDecimal b2 = new BigDecimal(Double.toString(v2));
    return b1.subtract(b2).setScale(2, BigDecimal.ROUND_HALF_UP).doubleValue();
}

From source file:Main.java

/**
 * This used when a double ends in 0 (IE 100.0) and you want to remove the significant figures
 * after the decimal point (assuming they end in zero)
 * @param value The double to convert//from  w  w  w .j a va 2s . c  o m
 * @param addDollarSign boolean, if null passed, nothing, if true passed, will add
 *                      a $ to the beginning
 * @return A String, formatted correctly. Will look like this: 104.44 or $99.
 *         if the last 2 are 00, it will remove the significant figures after
 *         the decimal as well as the decimal itself
 */
public static String convertDoubleToStringAddZero(double value, Boolean addDollarSign) {
    String str = Double.toString(value);
    if (str == null) {
        return null;
    }
    //String ending = str.substring((str.length()-2));
    String ending = str.substring((str.length() - 2), (str.length() - 1));
    if (ending.equalsIgnoreCase(".")) {
        str = str + "0";
    }
    if (addDollarSign != null) {
        if (addDollarSign) {
            str = "$" + str;
        }
    }
    ending = str.substring((str.length() - 3));
    if (ending.equalsIgnoreCase(".00")) {
        str = str.replace(".00", "");
    }

    return str;
}

From source file:TimeFormatUtil.java

/**
 * @param seconds/*www .j  av  a2s.  co  m*/
 * @return a string which represents a floating point number with max. 2
 *         decimals
 */
public static String formatTimeTo2Digits(double seconds) {
    String timeString = Double.toString(seconds);

    int dotPos = timeString.indexOf(".");
    if (dotPos < 0)
        return timeString;

    Pattern p = Pattern.compile("([0-9]{1,})\\.([0-9]{1,})");
    Matcher m = p.matcher(timeString);
    if (!m.matches())
        throw new RuntimeException(
                "WARNING: pattern '" + p.pattern() + "' " + "did not match input '" + timeString + "'");

    StringBuilder b = new StringBuilder(m.group(1));
    b.append('.');
    String afterCommaDigits = m.group(2);

    if (afterCommaDigits.length() > 2)
        b.append(m.group(2).substring(0, 2));
    else
        b.append(afterCommaDigits);

    return b.toString();
}

From source file:Main.java

public static double round(double d, int decimalPlace) {
    try {/*w  ww  .ja  v a2s  .  co  m*/
        BigDecimal bd = new BigDecimal(Double.toString(d));
        bd = bd.setScale(decimalPlace, BigDecimal.ROUND_HALF_UP);
        return bd.doubleValue();
    } catch (NumberFormatException e) {
        //on NaN or +/- infinity return the value
        return d;
    }
}

From source file:Main.java

/**
 * Convert to String a double value that received as parameter.
 *
 * @param doub the doub//from   w w w  . j  a  v a2s.c o  m
 * @return String
 */
public static String toStringDouble(Double doub) {
    return doub == null ? null : URLEncoder.encode(Double.toString(doub).replace(',', '.'));
}

From source file:Main.java

public static void writeDoubleAttr(Element element, String attributeName, double value) {
    element.setAttribute(attributeName, Double.toString(value));
}