Java Utililty Methods Double Number Format

List of utility methods to do Double Number Format

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Description

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

Method

Stringformat(Double number)
format 
String num = String.valueOf(number);
int index = num.indexOf(".");
num = num.substring(0, index);
return num;
Stringformat(double number, int nums)
format 
return String.format("%." + nums + "f", number);
doubleformat(double number, int precision)
format 
int tmp = 1;
for (int i = 0; i < precision; i++) {
    tmp *= 10;
int value = (int) Math.round(number * tmp);
return (value * 1d) / tmp;
Stringformat(double size, String type)
format 
int precision = 0;
if (size * 1000 % 10 > 0) {
    precision = 3;
} else if (size * 100 % 10 > 0) {
    precision = 2;
} else if (size * 10 % 10 > 0) {
    precision = 1;
} else {
...
Stringformat(double val, int n, int w)
format 
double incr = 0.5;
for (int j = n; j > 0; j--) {
    incr /= 10;
val += incr;
String s = Double.toString(val);
final int n1 = s.indexOf('.');
final int n2 = s.length() - n1 - 1;
...
Stringformat(double value, int decimalPlaces)
format 
if (decimalPlaces == 0) {
    return format(Math.round(value));
final long integerPart = (long) value;
double adjust = Math.pow(10, decimalPlaces);
long decimalPart = Math.round((Math.abs(value) * adjust) % adjust) + (long) adjust;
return format(integerPart) + "." + Long.toString(decimalPart).substring(1);
doubleformat(double value, int digits)
format 
if (digits < 0) {
    return value;
return Double.valueOf(String.format("%." + digits + "f", value));
Stringformat(final double power)
format 
return power == 0 ? "%.0f%s" : "%.1f%s";
StringformatDouble(double d)
Format a double into a string using #DECIMAL_FORMAT . 
return String.format(DECIMAL_FORMAT, d);
StringformatDouble(double d)
format Double 
String s = "" + d;
if (s.endsWith(".0"))
    s = s.substring(0, s.length() - 2);
return s;