Java Utililty Methods BigInteger Parse

BigInteger getBigInteger(byte[] payload, int offset, int length)
get Big Integer

byte[] arr = new byte[length + 1];
arr[0] = 0;
for (int i = 0; i < length; i++) {
 arr[i + 1] = payload[offset + length - 1 - i];
return new BigInteger(arr);

BigInteger getBigInteger(Console console, Function validator)
get Big Integer

if (validator == null)
 validator = value -> true;
String answer;
BigInteger value;
do {
 answer = readLine(console);
 try {
 value = new BigInteger(answer);
...

BigInteger getBigInteger(Number number)
get Big Integer

BigInteger bigInteger = null;
if (isByteShortIntegerOrLong(number)) {
 bigInteger = BigInteger.valueOf(number.longValue());
} else if (isFloatOrDouble(number)) {
 bigInteger = new BigDecimal(number.doubleValue()).toBigInteger();
} else if (number instanceof BigInteger) {
 bigInteger = (BigInteger) number;
} else if (number instanceof BigDecimal) {
...

BigInteger getBigInteger(Number value)
Utility method used to convert a Number into a BigInteger.

BigInteger result = null;
if (value != null) {
 if (value instanceof BigInteger) {
 result = (BigInteger) value;
 } else {
 result = BigInteger.valueOf(Math.round(value.doubleValue()));
return (result);

BigInteger getBigInteger(String value)
Get big integer from a string.

BigInteger bint = null;
try {
 bint = new BigInteger(value);
} catch (NumberFormatException e) {
 return null;
return bint;

BigInteger[] getBigIntegerArrayFromByteArray(byte[] buf)
Convert a byte[] into an instance of our value class.

long[] d = getLongArrayFromByteArray(buf);
BigInteger[] a = new BigInteger[d.length];
for (int i = 0; i < a.length; i++) {
 a[i] = BigInteger.valueOf(d[i]);
return a;

BigInteger getBigIntegerValue(final Integer value)
Returns the BigInteger value of the Integer value passed if the value passed is not null, otherwise returns null.

BigInteger result = null;
if (value != null) {
 result = BigInteger.valueOf(value);
return result;

String getBinaryNumberInString(BigInteger integerNumber)
This method gets the binary representation of any integer number.
The binary representation is returned in String format

return integerNumber.toString(BINARY_RADIX);

BigInteger toBigInteger(String bigInteger)
Wandelt einen String in einen BigInteger um

if (null == bigInteger)
 return null;
BigInteger value = null;
try {
 value = new BigInteger(bigInteger);
} catch (NumberFormatException e) {
return value;
...

BigInteger toBigInteger(String s)
to Big Integer

return new BigInteger(s);