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

StringformatNumberWithExtension(int num)
format Number With Extension 
int n = num;
while (n > 10)
    n = n % 10;
String append = "";
if (n == 1)
    append = (num == 11 ? "th" : "st");
else if (n == 2)
    append = (num == 12 ? "th" : "nd");
...
StringformatNumberWithKSeparators(int value)
Formats the number in value with thousand separator "," for display. 
StringBuilder sb = new StringBuilder(16);
String number = String.valueOf(value);
int len = number.length();
int end = len % 3, i = 0;
sb.append(number.substring(0, end));
for (i = end; i <= (len - 3); i += 3) {
    if (i > 0) {
        sb.append(",");
...
StringformatNumberWithSameWidth(int d)
format Number With Same Width 
return formatNumberWithSameWidth(d, String.valueOf(d).length());
StringformatOnlyLettersNumbersAndSpaces(String keyword)
format Only Letters Numbers And Spaces 
StringBuilder result = new StringBuilder();
if (!isEmpty(keyword)) {
    for (int i = 0; i < keyword.length(); i++) {
        char ch = keyword.charAt(i);
        if (Character.isLetterOrDigit(ch) || Character.isWhitespace(ch)) {
            result.append(ch);
return result.toString();
StringformatPaddedNumber(long number, int numericPadding)
format Padded Number 
StringBuilder outStrBfr = new StringBuilder(Long.toString(number));
while (numericPadding > outStrBfr.length()) {
    outStrBfr.insert(0, '0');
return outStrBfr.toString();
StringformatPartialName(String name, int numberOfCharacters)
Displays the end of the name if the name is longer that the number of specified characters. 
if (name == null)
    return null;
int n = DOTS.length() + numberOfCharacters;
int m = name.length();
if (m <= n)
    return name;
StringBuffer buffer = new StringBuffer();
buffer.append(DOTS);
...
StringformatPattern(String number, String pattern)
format Pattern 
StringBuffer str = new StringBuffer();
number = removeInvalidChars(number);
for (int i = 0, j = 0; i < number.length(); j++) {
    if (j < pattern.length()) {
        char c = pattern.charAt(j);
        if (c == 'x' || c == 'X')
            str.append(number.charAt(i++));
        else
...
StringformatPct(final Number amount)
Format the given amount into human readable string. 
if (amount == null) {
    return "--";
} else {
    return amount.doubleValue() + "%";
StringformatPercentage(Number numerator, Number denominator)
format Percentage 
return String.format("%.2f%%", 100.0 * numerator.doubleValue() / denominator.doubleValue());
StringformatPhone(String phoneNumber, String formattingPattern, String countryCode)
Format phone numbers (to international phone number format - eg +41 41 882 32 21) 
if (phoneNumber == null) {
    return null;
if (formattingPattern == null) {
    return phoneNumber;
if (countryCode == null) {
    return phoneNumber;
...