@GwtCompatible(emulated = true)
public final class IntMath
   extends Object

// Java code to show implementation of
// IntMath Class of Guava
import java.math.RoundingMode;
import com.google.common.math.IntMath;
  
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 80 is not
            // completely divisible by 3
            // thus rounding is required, and
            // RoundingMode is set as UNNESSARY
            System.out.println(IntMath.divide(80, 3,
                           RoundingMode.UNNECESSARY));
        }
        catch (ArithmeticException ex) {
            System.out.println("Error Message is : " + 
                                     ex.getMessage());
        }
    }
}

Error Message is : mode was UNNECESSARY, but rounding was necessary

// Java code to show implementation of
// IntMath Class of Guava
import java.math.RoundingMode;
import com.google.common.math.IntMath;
  
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 120 is divisible by 4, so
        // no exception is thrown
        System.out.println(IntMath.divide(120, 4,
                        RoundingMode.UNNECESSARY));
  
        // To compute GCD of two integers
        System.out.println("GCD is : " + 
                             IntMath.gcd(70, 14));
  
        // To compute log to base 10
        System.out.println("Log10 is : " +
          IntMath.log10(1000, RoundingMode.HALF_EVEN));
  
        // To compute remainder
        System.out.println("modulus is : " +
                          IntMath.mod(125, 5));
  
        // To compute factorial
        System.out.println("factorial is : " +
                           IntMath.factorial(7));
  
        // To compute log to base 2
        System.out.println("Log2 is : " + 
               IntMath.log2(8, RoundingMode.HALF_EVEN));
  
        // To compute square root
        System.out.println("sqrt is : " +
                    IntMath.sqrt(IntMath.pow(12, 2),
                          RoundingMode.HALF_EVEN));
    }
}

30
GCD is : 14
Log10 is : 3
modulus is : 0
factorial is : 5040
Log2 is : 3
sqrt is : 12