The checkedMultiply(int a, int b) is a method of Guava’s IntMath Class which accepts two parameters a and b, and returns their product.
Syntax:
public static int checkedMultiply(int a, int b)
Parameters: The method accepts two int values a and b and computes their product.
Return Value: The method returns the product of int values passed to it, provided it does not overflow.
Exceptions: The method checkedMultiply(int a, int b) throws ArithmeticException if the product i.e, (a – b) overflows in signed int arithmetic.
Below examples illustrate the implementation of above method:
Example 1:
// Java code to show implementation of// checkedMultiply(int a, int b) 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 a1 = 25; int b1 = 36; // Using checkedMultiply(int a, int b) // method of Guava's IntMath class int ans1 = IntMath.checkedMultiply(a1, b1); System.out.println("Product of " + a1 + " and " + b1 + " is: " + ans1); int a2 = 150; int b2 = 667; // Using checkedMultiply(int a, int b) // method of Guava's IntMath class int ans2 = IntMath.checkedMultiply(a2, b2); System.out.println("Product of " + a2 + " and " + b2 + " is: " + ans2); }} |
Output:
Product of 25 and 36 is: 900 Product of 150 and 667 is: 100050
Example 2:
// Java code to show implementation of// checkedMultiply(int a, int b) method// of Guava's IntMath class import java.math.RoundingMode;import com.google.common.math.IntMath; class GFG { static int findDiff(int a, int b) { try { // Using checkedMultiply(int a, int b) method // of Guava's IntMath class // This should throw "ArithmeticException" // as the product overflows in signed // int arithmetic int ans = IntMath.checkedMultiply(a, b); // Return the answer return ans; } catch (Exception e) { System.out.println(e); return -1; } } // Driver code public static void main(String args[]) { int a = Integer.MIN_VALUE; int b = 452; try { // Function calling findDiff(a, b); } catch (Exception e) { System.out.println(e); } }} |
Output:
java.lang.ArithmeticException: overflow
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