Java Utililty Methods Integer Format

List of utility methods to do Integer Format

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Description

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

Method

StringformatInt(int i, int radix, int len)
Format an integer into the specified radix, zero-filled. 
String s = Integer.toString(i, radix);
StringBuffer buf = new StringBuffer();
for (int j = 0; j < len - s.length(); j++)
    buf.append("0");
buf.append(s);
return buf.toString();
StringformatInt(int in, int precision)
convert a double into a String with a given precision default double formatting is not very pretty 
String ret = Integer.toString(in);
if (ret.length() > precision)
    throw new IllegalArgumentException("Cannot write " + in + " in " + precision + " digits");
while (ret.length() < precision)
    ret = "0" + ret;
return (ret);
StringformatInt(int myint, int maxint)
public function formatInt() 
Integer myInt = Integer.valueOf(myint);
Integer maxInt = Integer.valueOf(maxint);
int prefix = maxInt.toString().length() - myInt.toString().length();
StringBuffer formattedInt = new StringBuffer();
for (int i = 0; i < prefix; i++) {
    formattedInt.append(" ");
formattedInt.append(myint + " ");
...
StringformatINT(int n)
format INT 
String s = "" + n;
s = reverse(s);
String st = "";
for (int i = 0; i < s.length(); i++) {
    if (i != 0 && i % 3 == 0)
        st += ",";
    st += s.charAt(i);
return reverse(st);
StringformatInt(int n)
format Int 
return String.format("%,d", n);
CharSequenceformatInt(int value, int length)
Convert an int value to a String with leading zeros 
StringBuilder result = new StringBuilder(length);
if (value < 0) {
    result.append('-');
String nr = Integer.toString(Math.abs(value));
for (int i = 0; i < length - nr.length(); i++) {
    result.append('0');
result.append(nr);
return result;
StringformatInt(int value, int numDigit)
Format an integer value with specifie integer digits number 
if (numDigit == 0) {
    return "";
String stringValue = Integer.toString(value);
if (numDigit < 0) {
    return stringValue;
int lengthValue = stringValue.length();
...
StringformatInt(int value, int width)
format Int 
StringBuilder sb = new StringBuilder();
sb.append(value);
if (width > sb.length()) {
    sb.insert(0, SPACES12, 0, width - sb.length());
return sb.toString();
IntegerformatInt(String value)

Checks if the value can safely be converted to a int primitive.

Integer result = null;
try {
    result = new Integer(value);
} catch (Exception e) {
return result;
IntegerformatInt(String value)
Checks if the value can safely be converted to a int primitive. 
if (isBlankOrNull(value)) {
    return null;
try {
    return new Integer(value);
} catch (NumberFormatException e) {
    return null;