Java Utililty Methods Zero Format

List of utility methods to do Zero Format

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Description

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

Method

StringzeroFill(int value, int fieldWidth)
Returns a zero-filled string. 
StringBuilder buf = new StringBuilder();
buf.append(value);
while (buf.length() < fieldWidth) {
    buf.insert(0, ZERO);
return buf.toString();
Stringzerofill(int x, int desiredWidth)
fills the left side of a number with zeros
e.g. 
StringBuffer buf = new StringBuffer();
if (x < 0) {
    buf.append("-");
    desiredWidth--;
    x = -x;
while (desiredWidth > 7) {
    buf.append("0");
...
StringzeroFillString(String originalString, int numZeros)
zero Fill String 
if (originalString.length() < numZeros) {
    int zerosToAdd = numZeros - originalString.length();
    for (int i = 0; i < zerosToAdd; i++) {
        originalString = "0" + originalString;
return originalString;
StringzeroFormat(Integer source)
zero Format 
String stringSource = String.valueOf(source);
if (stringSource.length() >= 3)
    return source + "";
return String.format("%03d", source);
StringzeroFormattedStr(int number, int length)
zero Formatted Str 
return zeroFormattedStr((long) number, length);
intzeroIfNull(Integer i)
converts an Integer to an int, mapping null to 0 and mapping Integer(0) to 0 also. 
final int result = (i == null) ? 0 : i;
assert !(i == null) || (result == 0);
assert !(i != null) || (result == i);
return result;
intzeroIfNull(Integer i)
zero If Null 
return i != null ? i.intValue() : 0;
intzeroIfNullStrict(Integer i)
converts an Integer to an int, mapping null to 0. 
final int result;
if (i == null) {
    result = 0;
} else {
    result = i;
    if (result == 0) {
        throw new IllegalArgumentException("langutils.integer.not.allowed.exception");
assert !(i == null) || (result == 0);
assert !((i != null) && (i != 0)) || (result == i);
return result;
byte[]zeroInterval(byte[] x, int start, int end)
zero Interval 
final byte[] result = x.clone();
for (int i = start; i < end; i++)
    result[i] = (byte) 0;
return result;
longzeroLowerBits(long bits, int nBits)
Zeroes the lower n bits of a bitstring. 
long invMask = (1L << nBits) - 1L;
long mask = ~invMask;
long zeroed = bits & mask;
return zeroed;