Java Utililty Methods BigInteger from Stream

BigInteger readBigInteger(ByteArrayInputStream bais)
read Big Integer

return new BigInteger(readData(bais));

BigInteger readBigInteger(DataInputStream dis)
Read a (reasonably short) BigInteger from a DataInputStream param dis the stream to read from return a BigInteger

short i = dis.readShort();
if (i < 0) {
 throw new IOException("Invalid BigInteger length: " + i);
byte[] buf = new byte[i];
dis.readFully(buf);
return new BigInteger(1, buf);

BigInteger readBigInteger(InputStream input)
Read the signed arbitrary sized BigInteger BigInteger in vint format

BigInteger result = BigInteger.ZERO;
long work = 0;
int offset = 0;
long b;
do {
 b = input.read();
 if (b == -1) {
 throw new EOFException("Reading BigInteger past EOF from " + input);
...

BigInteger readBigInteger(int n, DataInput dis)
read Big Integer

BigInteger ret = BigInteger.ZERO;
byte[] temp = new byte[n];
dis.readFully(temp, 0, n);
for (int j = n - 1; j >= 0; j--) {
 ret = ret.or(BigInteger.valueOf(0xFF & temp[j]));
 ret = ret.shiftLeft(8);
ret = ret.shiftRight(8);
...

BigInteger readLineAsBigInteger(BufferedReader br)
Executes readline with the given buffered reader Converts the read string to an BigInteger

String str = br.readLine();
if (str == null) {
 throw new IOException();
return new BigInteger(str);

BigInteger readLuposBigInteger(final int numberOfBits, final InputStream is)

readLuposBigInteger.

BigInteger result = BigInteger.ZERO;
BigInteger factor = BigInteger.ONE;
final BigInteger BYTE = BigInteger.valueOf(256);
int remainingBits = numberOfBits;
while (remainingBits > 0) {
 final int currentValueByte = is.read();
 if (currentValueByte < 0) {
 return null;
...