Java Utililty Methods Fraction Format

List of utility methods to do Fraction Format

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Description

The list of methods to do Fraction Format are organized into topic(s).

Method

doubleformatDouble(double orig)
format Double 
DecimalFormat df = new DecimalFormat("######0.000");
return Double.valueOf(df.format(orig)).doubleValue();
StringformatDouble(Double someDouble)
Formats a double as a string with a default number of significant digits depending on the argument's value. 
return formatDouble(someDouble, false);
StringformatDouble(Double v)
format Double 
try {
    DecimalFormat df = new DecimalFormat();
    df.setGroupingUsed(false);
    df.setMaximumFractionDigits(12);
    return df.format(v);
} catch (java.lang.IllegalArgumentException e) {
    return v.toString();
StringformatDouble(double value)
format Double 
return formatter.format(value);
StringformatDouble(double value)
format Double 
return Double.isNaN(value) ? "NaN" : _decimalFormat.format(value);
StringformatDouble(double value, int precision)
Returns a formatted Double value given a specific DecimalFormat
If more than 4 integer, then we display the value in scientific notation 
String result;
if (((int) value) > 9999 || ((int) value) < -9999) {
    result = new DecimalFormat("0.######E0").format(value);
} else
    result = String.valueOf(roundDouble(value, precision));
return result == null ? "-" : result;
java.lang.StringFormatDouble(final double dblValue, final int iNumLeft, final int iNumRight, final double dblMultiplier)
Format the double input by multiplying, and then adding left and right adjustments 
java.lang.String strFormat = "#";
for (int i = 0; i < iNumLeft; ++i)
    strFormat += "0";
if (0 != iNumRight) {
    strFormat += ".";
    for (int i = 0; i < iNumRight; ++i)
        strFormat += "0";
return new java.text.DecimalFormat(strFormat).format(dblMultiplier * dblValue);
StringformatDouble(Object obj)
format Double 
DecimalFormat fmt = new DecimalFormat("#,##0.00");
String str = String.valueOf(obj);
if (obj instanceof Double) {
    return fmt.format(obj);
} else if (str.matches("^[-\\+]?\\d+(\\.\\d+)?$")) {
    return fmt.format(Double.valueOf(str));
} else {
    return toStringWithOutNull(str);
...
StringformatDouble(Object value)
format Double 
NumberFormat doubleFormat = NumberFormat.getNumberInstance();
return doubleFormat.format(((Number) value).doubleValue());
StringformatDoubleAmount(double amount)
Formats the given double as a dollar amount, with negative amounts in parentheses. 
NumberFormat formatter = new DecimalFormat("$#,###,##0.00;($#,###,##0.00)");
return formatter.format(amount);