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

StringgetQosFlowId(short tableId, BigInteger dpId, int lportTag)
get Qos Flow Id 
return new StringBuffer().append(tableId).append(dpId).append(lportTag).toString();
StringgetRadixNumberInString(BigInteger integerNumber, int radix)
This method gets the required representation of any number according to the given radix or base. 
return integerNumber.toString(radix);
BigIntegergetRandomBigInteger(int bits)
Creates a random BigInteger greater than 0 with the specified number of bits. 
return new BigInteger(bits, new Random());
BigIntegergetRandomInteger(BigInteger n, Random rand)
Return a uniformly chosen integer between 0 and n-1. 
BigInteger r;
int maxbits = n.bitLength();
do {
    r = new BigInteger(maxbits, rand);
} while (r.compareTo(n) >= 0);
return r;
intgetSize(BigInteger number)
Returns the number of bits in the two's-complement representation of the given number, including a sign bit only if number is less than zero. 
int cmp = number.compareTo(BigInteger.ZERO);
if (cmp == 0) {
    return 1;
} else {
    int bitLength = number.bitLength();
    return (cmp > 0) ? bitLength : bitLength + 1;
StringgetValueWithUnit(BigInteger value, final int places)
Returns the given number as a string complete with unit (e.g., kilo, mega, etc.), to the specififed number of decimal places. 
if (value == null)
    return null;
String s = "1";
for (int i = 0; i < places; i++)
    s += "0";
final BigInteger scale = new BigInteger(s);
value = value.multiply(scale);
int unit = 0;
...
StringgetVersionString(BigInteger versionNumber)
get Version String 
StringBuilder versionStringBuilder = new StringBuilder();
BigInteger integerMask = BigInteger.valueOf(Integer.MAX_VALUE);
for (int i = 0; i < MAX_DIVISIONS; i++) {
    int division = (short) versionNumber.shiftRight((Integer.SIZE * (MAX_DIVISIONS - 1 - i)))
            .and(integerMask).intValue();
    if (versionStringBuilder.length() != 0) {
        versionStringBuilder.append(".");
    versionStringBuilder.append(division);
return versionStringBuilder.toString();
booleangreater(BigInteger i1, BigInteger i2)
greater 
return i1.subtract(i2).signum() > 0;
StringhexEncode(BigInteger bigInteger)
Returns the BigInteger as a hex encoded string. 
return hexEncode(bigInteger, null);
BigIntegerincrement(BigInteger integer)
Increments the given integer by one. 
return add(integer == null ? BigInteger.ZERO : integer, BigInteger.ONE);