Java Utililty Methods Number to String

List of utility methods to do Number to String

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Description

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

Method

StringnumberToString(double num, int digits)
number To String 
if (digits < 0)
    throw new RuntimeException("Digits must be >= 0!");
String[] parts = String.valueOf(num).split("[.]");
if (parts[1].matches("0"))
    return parts[0];
if (parts[1].length() > digits) {
    String end = parts[1].substring(0, digits);
    while (end.endsWith("0"))
...
StringnumberToString(int gmNumber)
Translates the General-Midi-Instrument-Number into a human readable string. 
if ((gmNumber >= 0) && (gmNumber < instrumentNames.length)) {
    return instrumentNames[gmNumber];
return "" + gmNumber;
StringnumberToString(int number, int length, String type, int location)
number To String 
String numberStr = String.valueOf(number);
if (numberStr.length() == length) {
    return numberStr;
} else if (numberStr.length() > length) {
    return numberStr.substring(numberStr.length() - length);
StringBuffer value = new StringBuffer();
for (int i = 0; i < length - numberStr.length(); i++) {
...
StringnumberToString(Number number)
Produce a string from a Number. 
if (number == null) {
    return "null";
if (!testValidity(number)) {
    throw new RuntimeException("Can't convert number: " + number);
String string = number.toString();
if (string.indexOf('.') > 0 && string.indexOf('e') < 0 && string.indexOf('E') < 0) {
...
StringnumberToString(Object instance)
number To String 
String s = instance.toString();
int i = s.lastIndexOf(".");
if (i == -1) {
    return s;
String result = s.substring(0, i);
return result;
StringnumberToString(Object num)
number To String 
if (num == null) {
    return null;
} else if (num instanceof Integer && (Integer) num > 0) {
    return Integer.toString((Integer) num);
} else if (num instanceof Long && (Long) num > 0) {
    return Long.toString((Long) num);
} else if (num instanceof Float && (Float) num > 0) {
    return Float.toString((Float) num);
...
StringnumberToStringFlushLeft(long number, int width)

Returns a long value as a string, inserts spaces on the left so that the specified width is reached. 

return flushLeft(Long.toString(number), width);