Java Utililty Methods BigInteger Format

List of utility methods to do BigInteger Format

  1. HOME
  2. Java
  3. B
  4. BigInteger Format

Description

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

Method

StringformatBigInteger(BigInteger bi, int length)
format Big Integer 
String s = bi.toString(16);
StringBuffer buf = new StringBuffer(s.length());
int zeroesToAppend = length - s.length();
int count = 0;
buf.append("    ");
for (int i = 0; i < zeroesToAppend; i++) {
    count++;
    buf.append('0');
...
voidformatBigIntegerBinary(final long value, byte[] buf, final int offset, final int length, final boolean negative)
format Big Integer Binary 
BigInteger val = BigInteger.valueOf(value);
final byte[] b = val.toByteArray();
final int len = b.length;
final int off = offset + length - len;
System.arraycopy(b, 0, buf, off, len);
final byte fill = (byte) (negative ? 0xff : 0);
for (int i = offset + 1; i < off; i++) {
    buf[i] = fill;
...
StringformatSerialNumber(BigInteger bi)
format Serial Number 
if (bi == null) {
    return "";
String sn = bi.toString(16);
char[] chars = sn.toUpperCase().toCharArray();
StringBuilder sb = new StringBuilder();
for (int i = 0; i < chars.length; i++) {
    sb.append(chars[i]);
...
StringformatSerialNumber(final BigInteger serial)
Get a proper string representation of a certificate's serial number. 
StringBuffer b = new StringBuffer(serial.toString(16).toUpperCase());
if ((b.length() % 2) != 0) {
    b.insert(0, "0"); 
int index = 2;
for (index = 2; index < b.length(); index += 3) {
    b.insert(index, ":"); 
return b.toString();
StringformatSize(BigInteger size)
format Size 
if (size.compareTo(ONE_THOUSAND) == 1) {
    return size.divide(ONE_THOUSAND).toString() + " TB";
} else
    return size.toString() + " GB";
StringformatTime(BigInteger femto)
format Time 
if (femto.equals(BigInteger.ZERO))
    return "0";
StringBuilder time = new StringBuilder(femto.toString());
String[] units = { "fs", "ps", "ns", "us", "ms", "sec", "ksec", "Msec" };
for (String unit : units) {
    if (time.length() <= 3 || !time.toString().endsWith("000"))
        return time + " " + unit;
    time.setLength(time.length() - 3);
...