Java Utililty Methods Number Format

List of utility methods to do Number Format

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Description

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

Method

StringformatNumber(double dd)
Write the number in bbbb.bb format needed for currency. 
String str = "" + dd;
String ret = "";
int l = str.length();
int i = str.indexOf('.');
int r = i + 3; 
if (i > -1 && r < l) {
    ret = str.substring(0, r);
} else {
...
StringformatNumber(double dscore)
format Number 
long score = Math.round(dscore * 100);
return score / 100 + "." + (score % 100 < 10 ? "0" : "") + score % 100;
StringformatNumber(double number, int decimalPlaces)
Format the given number as a String, including the given number of decimal places. 
String s = String.valueOf(number);
int idx1 = s.indexOf('.');
if (idx1 == -1) {
    return s;
} else {
    int idx2 = s.indexOf('E');
    int dp = decimalPlaces + (idx2 >= 0 ? 0 : 1);
    String t = s.substring(0, Math.min(idx1 + dp, s.length()));
...
StringformatNumber(Double val, int numDec, int width)
format Number 
if (val == null) {
    return String.format("%" + width + "s", UNKNOWN_VALUE);
} else {
    return String.format("%" + width + "." + numDec + "f", val);
StringformatNumber(double value)
format Number 
if (value < 1000D)
    return String.valueOf(value);
else if (value < 1000000D)
    return String.valueOf(Math.round(value) / 1000D) + "K";
else if (value < 1000000000D)
    return String.valueOf(Math.round(value / 1000D) / 1000D) + "M";
else if (value < 1000000000000D)
    return String.valueOf(Math.round(value / 1000000D) / 1000D) + "B";
...
StringformatNumber(double value)
format Number 
if (value < 1000D)
    return String.valueOf(value);
else if (value < 1000000D)
    return String.valueOf(Math.round(value) / 1000D) + "K";
else if (value < 1000000000D)
    return String.valueOf(Math.round(value / 1000D) / 1000D) + "M";
else if (value < 1000000000000D)
    return String.valueOf(Math.round(value / 1000000D) / 1000D) + "B";
...
StringformatNumber(final long number)
Formats the given number into one where thousands are separated by a space. 
long divided = number;
final StringBuffer sb = new StringBuffer();
while (divided > 1000) {
    long rest = divided % 1000;
    sb.insert(0, " " + String.format("%03d", rest));
    divided = divided / 1000;
long rest = divided % 1000;
...
StringformatNumber(final String number)
format Number 
String num = "";
String decimal = "";
int index = number.lastIndexOf('.');
if (index >= 0) {
    num = number.substring(0, index);
    decimal = number.substring(index);
} else {
    num = number;
...
voidformatNumber(final StringBuilder buf, final long number)
format Number 
if (number < 10) {
    buf.append("0");
buf.append(number);
StringformatNumber(float num, int fragmentSize)
fragmentSize must greater 1. 
String ret = Float.toString(num);
int len;
if ((len = ret.indexOf(".")) != -1 && len + fragmentSize + 1 < ret.length()) {
    ret = ret.substring(0, len + fragmentSize + 1);
return ret;