The method sqrt(int x, RoundingMode mode) of Guava’s IntMath class returns the square root of x, rounded with the specified rounding mode.
Syntax:
public static int sqrt(int x, RoundingMode mode)
Exceptions:
- IllegalArgumentException: if x < 0.
- ArithmeticException: if mode is RoundingMode.UNNECESSARY and sqrt(x) is not an integer.
Enum RoundingMode
| Enum Constant | Description |
|---|---|
| CEILING | Rounding mode to round towards positive infinity. |
| DOWN | Rounding mode to round towards zero. |
| FLOOR | Rounding mode to round towards negative infinity. |
| HALF_DOWN | Rounding mode to round towards “nearest neighbor” unless both neighbors are equidistant, in which case round down. |
| HALF_EVEN | Rounding mode to round towards the “nearest neighbor” unless both neighbors are equidistant, in which case, round towards the even neighbor. |
| HALF_UP | Rounding mode to round towards “nearest neighbor” unless both neighbors are equidistant, in which case round up. |
| UNNECESSARY | Rounding mode to assert that the requested operation has an exact result, hence no rounding is necessary. |
| UP | Rounding mode to round away from zero. |
Below given are some examples to understand the implementation in a better way :
Example 1:
// Java code to show implementation of// sqrt(int x, RoundingMode mode) method// of Guava's IntMath class import java.math.RoundingMode;import com.google.common.math.IntMath; class GFG { // Driver code public static void main(String args[]) { int x1 = 226; // Using sqrt(int x, RoundingMode mode) // method of Guava's IntMath class // The RoundingMode HALF_EVEN rounds towards // the nearest neighbor unless both neighbors // are equidistant, in which case, round towards // the even neighbor. int ans1 = IntMath.sqrt(x1, RoundingMode.HALF_EVEN); System.out.println("Square root of x1 is: " + ans1); int x2 = 154; // Using sqrt(int x, RoundingMode mode) // method of Guava's IntMath class // The RoundingMode FLOOR rounds towards // negative infinity. int ans2 = IntMath.sqrt(x2, RoundingMode.FLOOR); System.out.println("Square root of x2 is: " + ans2); }} |
Output:
Square root of x1 is: 15 Square root of x2 is: 12
Example 2:
// Java code to show implementation of// sqrt(int x, RoundingMode mode) method// of Guava's IntMath class import java.math.RoundingMode;import com.google.common.math.IntMath; class GFG { // Driver code public static void main(String args[]) { int x1 = -65; try { // Using sqrt(int x, RoundingMode mode) // method of Guava's IntMath class // The RoundingMode HALF_EVEN rounds towards // the nearest neighbor unless both neighbors // are equidistant, in which case, round towards // the even neighbor. // This should throw "IllegalArgumentException" // as x1 < 0 int ans1 = IntMath.sqrt(x1, RoundingMode.HALF_EVEN); } catch (Exception e) { System.out.println(e); } }} |
Output:
java.lang.IllegalArgumentException: x (-65) must be >= 0
