public static long pow(long b, int k)

// Java code to show implementation of
// pow(long b, int k) method of Guava's
// LongMath Class
  
import java.math.RoundingMode;
import com.google.common.math.LongMath;
  
class GFG {
  
    // Driver code
    public static void main(String args[])
    {
        long b1 = 4;
        int k1 = 5;
  
        long ans1 = LongMath.pow(b1, k1);
  
        System.out.println(b1 + " to the " + k1
                           + "th power is: "
                           + ans1);
  
        long b2 = 12;
        int k2 = 3;
  
        long ans2 = LongMath.pow(b2, k2);
  
        System.out.println(b2 + " to the " + k2
                           + "rd power is: "
                           + ans2);
    }
}

4 to the 5th power is: 1024
12 to the 3rd power is: 1728

// Java code to show implementation of
// pow(long b, int k) method of Guava's
// LongMath class
  
import java.math.RoundingMode;
import com.google.common.math.LongMath;
  
class GFG {
  
    static long findPow(long b, int k)
    {
        try {
            // Using pow(long b, int k)
            // method of Guava's LongMath class
            // This should throw "IllegalArgumentException"
            // as k < 0
            long ans = LongMath.pow(b, k);
  
            // Return the answer
            return ans;
        }
        catch (Exception e) {
            System.out.println(e);
            return -1;
        }
    }
  
    // Driver code
    public static void main(String args[])
    {
        long b = 4;
        int k = -5;
  
        try {
            // Using pow(long b, int k)
            // method of Guava's LongMath class
            // This should throw "IllegalArgumentException"
            // as k < 0
            LongMath.pow(b, k);
        }
        catch (Exception e) {
            System.out.println(e);
        }
    }
}

java.lang.IllegalArgumentException: exponent (-5) must be >= 0