Java Utililty Methods BigInteger Calculate

List of utility methods to do BigInteger Calculate

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Description

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

Method

voidwriteBigInteger(ByteArrayOutputStream baos, BigInteger bi)
write Big Integer 
writeData(baos, bi.toByteArray());
voidwriteBigInteger(ByteArrayOutputStream stream, BigInteger num)
write Big Integer 
int length = num.toByteArray().length;
byte[] data = new byte[4];
data[0] = (byte) ((length >> 24) & 0xFF);
data[1] = (byte) ((length >> 16) & 0xFF);
data[2] = (byte) ((length >> 8) & 0xFF);
data[3] = (byte) (length & 0xFF);
stream.write(data);
stream.write(num.toByteArray());
...
voidwriteBigInteger(OutputStream output, BigInteger value)
Write the arbitrarily sized signed BigInteger in vint format. 
value = value.shiftLeft(1);
int sign = value.signum();
if (sign < 0) {
    value = value.negate();
    value = value.subtract(BigInteger.ONE);
int length = value.bitLength();
while (true) {
...
voidwriteField(String tagName, BigInteger value, PrintWriter writer, int indent)
adds a child to the element with the given name and the given value. If value is null, nothing is done 
if (value == null)
    return;
writeField(tagName, value.toString(), writer, indent);
voidwriteLuposBigInteger(final BigInteger value, final int numberOfBits, final OutputStream os)

writeLuposBigInteger.

int remainingBits = numberOfBits;
BigInteger remainingValue = value;
final BigInteger BYTE = BigInteger.valueOf(256);
while (remainingBits > 0) {
    final BigInteger[] result = remainingValue.divideAndRemainder(BYTE);
    remainingValue = result[0];
    os.write((byte) result[1].intValue());
    remainingBits -= 8;
...
voidwriteMPI(BigInteger num, OutputStream out)
write MPI 
out.write(MPIbytes(num));