BigIntegerMath is used to perform mathematical operations on BigInteger values. Basic standalone math functions are divided into the classes IntMath, LongMath, DoubleMath, and BigIntegerMath based on the primary numeric type involved. These classes have parallel structure, but each supports only the relevant subset of functions. Similar functionality for int and for long can be found in IntMath and LongMath respectively.
Declaration : The declaration for com.google.common.math.BigIntegerMath class is :
@GwtCompatible(emulated = true) public final class BigIntegerMath extends Object
Below table shows the methods provided by BigIntegerMath Class of Guava :
Exceptions :
- log2 : IllegalArgumentException if x <= 0
- log10 : IllegalArgumentException if x <= 0
- sqrt : IllegalArgumentException if x < 0
- divide : ArithmeticException if q == 0, or if mode == UNNECESSARY and a is not an integer multiple of b
- factorial : IllegalArgumentException if n < 0
- binomial : IllegalArgumentException if n < 0, k n
Example 1 :
// Java code to show implementation of// BigIntegerMath Class of Guavaimport java.math.*;import com.google.common.math.BigIntegerMath;  class GFG {      // Driver code    public static void main(String args[])    {          // Creating an object of GFG class        GFG obj = new GFG();          // Function calling        obj.examples();    }      private void examples()    {          try {              // exception will be thrown as 10 is            // not completely divisible by 3            // thus rounding is required, and            // RoundingMode is set as UNNESSARY            System.out.println(BigIntegerMath.divide(BigInteger.TEN,                                                new BigInteger("3"),                                            RoundingMode.UNNECESSARY));        }        catch (ArithmeticException ex) {            System.out.println("Error Message is : " +                                       ex.getMessage());        }    }} |
Output:
Error Message is : Rounding necessary
Example 2 :
// Java code to show implementation of// BigIntegerMath Class of Guavaimport java.math.*;import com.google.common.math.BigIntegerMath;  class GFG {      // Driver code    public static void main(String args[])    {          // Creating an object of GFG class        GFG obj = new GFG();          // Function calling        obj.examples();    }      private void examples()    {          // As 10 is divisible by 5, so        // no exception is thrown        System.out.println(BigIntegerMath.divide(BigInteger.TEN,                                        new BigInteger("5"),                                    RoundingMode.UNNECESSARY));          // To compute log to base 10        System.out.println("Log10 is : " +              BigIntegerMath.log10(new BigInteger("1000"),                                  RoundingMode.HALF_EVEN));          // To compute factorial        System.out.println("factorial is : " +                          BigIntegerMath.factorial(7));          // To compute log to base 2        System.out.println("Log2 is : " +            BigIntegerMath.log2(new BigInteger("8"),                          RoundingMode.HALF_EVEN));          // To compute square root        System.out.println("sqrt is : " +                           BigIntegerMath.sqrt(BigInteger.                    TEN.multiply(BigInteger.TEN),                        RoundingMode.HALF_EVEN));    }} |
Output:
2 Log10 is : 3 factorial is : 5040 Log2 is : 3 sqrt is : 10
Reference : Google Guava
[…] method divide(BigInteger p, BigInteger q, RoundingMode mode) of Guava’s BigIntegerMath class returns the result of dividing p by q, rounding using the specified […]