Java Utililty Methods BigInteger Parse

List of utility methods to do BigInteger Parse

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Description

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

Method

BigIntegerToBigInteger(String s)
To Big Integer 
if (ToString(s).isEmpty()) {
    return null;
return new BigInteger(ToString(s));
BigIntegertoBigInteger(String text)
to Big Integer 
StringBuilder numberString = new StringBuilder(BLOCK_SIZE + 1);
numberString.append("1");
for (int i = 0; i < text.length(); ++i) {
    char c = text.charAt(i);
    int asc = (int) c;
    if (String.valueOf(asc).length() <= 2) {
        numberString.append("0");
    numberString.append(asc);
return new BigInteger(numberString.toString());
BigIntegertoBigInteger(String value, BigInteger defaultValue)
to Big Integer 
try {
    if (value == null || "".equals(value.trim()))
        return defaultValue;
    value = value.trim();
    if (value.startsWith("N") || value.startsWith("n"))
        return new BigInteger(value).negate();
    return new BigInteger(value);
} catch (Exception e) {
...
StringtoBigIntegerString(byte[] bytes, boolean signed, boolean littleEndian)
Convert bytes to big integer number String 
if (bytes == null)
    return null;
if (bytes.length <= 0)
    return "";
int len = bytes.length;
if (littleEndian) {
    for (int i = 0; i < len / 2; i++) {
        byte b = bytes[i];
...