Java Utililty Methods Decimal Format

List of utility methods to do Decimal Format

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Description

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

Method

StringtoString(double value)
to String 
if (Double.isNaN(value)) {
    return "NaN";
BigDecimal bigDecimal = new BigDecimal(value);
return bigDecimal.toString();
StringtoString(double value, int precision)
Thread-safe version of converting a double value to a String when only a certain number of digits are desired after a decimal point. 
StringBuilder buf = new StringBuilder("0");
if (precision > 0) {
    buf.append(".");
for (int i = 0; i < precision; i++) {
    buf.append("0");
DecimalFormat format = new DecimalFormat(buf.toString());
...
StringtoString(double[] array)
to String 
String display = "[";
for (double val : array) {
    display += val + ", ";
display = display.substring(0, display.length() - 2);
display += "]";
return display;
StringtoString(Double[] input)
to String 
StringBuilder ret = new StringBuilder();
for (Double o : input) {
    ret.append("");
    if (o != null)
        ret.append("" + dcf.format(o));
    else
        ret.append("NULL");
    ret.append(" ");
...
StringtoString(double[][] a, int decimals)
to String 
if (decimals < 0)
    throw new IllegalArgumentException("Number of decimals must be positive");
StringBuilder decs = new StringBuilder("0.");
for (int i = 0; i < decimals; i++)
    decs.append("0");
NumberFormat decimalsFormat = new DecimalFormat(decs.toString());
StringBuilder sb = new StringBuilder();
for (int i = 0; i < a.length; i++) {
...
StringtoString(final Double value)
to String 
if (Double.isNaN(value) || Double.isInfinite(value)) {
    return "U";
} else {
    return formatters.get().format(value);
StringtoString(final double value, final int maxDecimalPlaces)
to String 
DECIMAL_FORMAT.setMaximumFractionDigits(maxDecimalPlaces);
return DECIMAL_FORMAT.format(value);
StringtoStringForHumans(double doubleToConvert)
to String For Humans 
NumberFormat formatter = NumberFormat.getInstance();
return formatter.format(doubleToConvert);
StringtoStringNoDigits(double[] v)
to String No Digits 
NumberFormat nf = new DecimalFormat("0");
String res = "";
for (int i = 0; i < v.length; i++) {
    res += (i > 0 ? "," : "") + nf.format(v[i]);
return res + "";
StringtoStringScientific(double x)
Scientific format 
return scientific_.format(x);