Java Utililty Methods BigInteger Value Check

List of utility methods to do BigInteger Value Check

  1. HOME
  2. Java
  3. B
  4. BigInteger Value Check

Description

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

Method

booleanisIntValue(BigInteger bi)
Checks, whether a BigInteger my be converted to an integer, i.e. 
if (bi.compareTo(MIN_INT_BIG_INTEGER) < 0)
    return false;
if (bi.compareTo(MAX_INT_BIG_INTEGER) > 0)
    return false;
return true;
booleanisLessThan(BigInteger valueA, BigInteger valueB)
is Less Than 
return valueA.compareTo(valueB) < 0;
booleanisLong(BigInteger number)
is Long 
long i = number.longValue();
BigInteger b = new BigInteger(String.valueOf(i));
return number.equals(b);
booleanisMersenneNumber(BigInteger n)
Method to check if a given number is a Mersenne number (primality of the number is not checked). 
if (n.signum() < 0)
    return false;
byte bytes[] = n.toByteArray();
byte b = bytes[0];
if ((b & (b + 1)) != 0)
    return false;
for (int i = 1; i < bytes.length; i++)
    if (bytes[i] != -1)
...
booleanisNegative(BigInteger i)
is Negative 
return i.signum() < 0;
booleanisNumberInRange(String text, BigInteger min, BigInteger max)
Check whether the number is in range [min, max] inclusive. 
BigInteger value = null;
try {
    value = new BigInteger(text);
} catch (Exception e) {
    return false;
if (min != null) {
    if (value.compareTo(min) < 0) {
...
booleanisOdd(BigInteger in)
Tests whether a given BigInteger is odd. 
return in.testBit(0);
booleanisOdd(BigInteger x)
is Odd 
return x.testBit(0);
booleanisPerfectCubic(BigInteger n)
is Perfect Cubic 
while (maxCubicInCache.compareTo(n) < 0) {
    Long v = cubicCache.get(maxCubicInCache);
    ++v;
    BigInteger vb = BigInteger.valueOf(v);
    BigInteger k = vb.multiply(vb).multiply(vb);
    cubicCache.put(k, v);
    maxCubicInCache = k;
return cubicCache.containsKey(n);
booleanisPositive(final BigInteger value)
Tests if a given BigInteger value is positive. 
if (value == null) {
    return false;
return value.signum() == 1;