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

Stringformat(int decs, double number)
Formats a number to a given amount of decimal places. 
return String.format("%." + decs + "f", number);
Stringformat(int number, int length)
format 
String numberString = Integer.toString(number);
char[] erg = new char[length];
for (int i = 0; i < length; i++) {
    erg[i] = '0';
char[] numberStringChars = numberString.toCharArray();
for (int i = 0; i < numberString.length(); i++) {
    erg[length - 1 - i] = numberStringChars[numberString.length() - 1 - i];
...
Stringformat(Number number)
Returns a formatted string of the specified number. 
String formatted = Double.toString(number.doubleValue()).replaceAll("\\.0+$", "") 
        .replaceAll("(\\.[0-9]*[1-9])0+$", "$1"); 
return formatted;
Stringformat(String number)
format 
StringBuilder cleanedNumber = new StringBuilder();
for (int index = 0; index < number.length(); index++) {
    char c = number.charAt(index);
    if (c == '+' || c == '0' || c == '1' || c == '2' || c == '3' || c == '4' || c == '5' || c == '6'
            || c == '7' || c == '8' || c == '9')
        cleanedNumber.append(c);
return cleanedNumber.toString();
...
Doubleformat(String number)
format 
Double ret = null;
String work = number.replace(',', '.');
ret = new Double(work);
return ret;
StringformatAmountDigits(String numberString, int length)
format Amount Digits 
while (numberString.length() < length) {
    numberString = "0" + numberString;
return numberString;
byte[]formatBinaryNumber(int number, int size)
format Binary Number 
byte[] bin = new byte[size];
int work = number;
for (int i = (size - 1); i >= 0; i--) {
    int b = (work & 0xff);
    bin[i] = (byte) b;
    work = (work >> 8);
return bin;
...
StringformatBytes(long number)
format Bytes 
float div = 1024;
float start = number;
int pfix = 0;
while (start > div) {
    start = start / div;
    pfix++;
start = ((long) (start * 10)) / 10f;
...
StringformatBytesHumanReadable(float number)
format Bytes Human Readable 
String unit = "bytes";
if (number > 1024) {
    number /= 1024;
    unit = "KiB";
if (number > 1024) {
    number /= 1024;
    unit = "MiB";
...
StringformatCardNumber(String cardNumber)
format Card Number 
StringBuilder formatted = new StringBuilder();
if (cardNumber.length() == 10 && cardNumber.startsWith("B")) {
    formatted.append(cardNumber.substring(0, 1));
    formatted.append(' ');
    formatted.append(cardNumber.substring(1, 8));
    formatted.append(' ');
    formatted.append(cardNumber.substring(8));
} else if (cardNumber.length() == 12) {
...