StrictMath multiplyFull() method in Java with Examples

The multiplyFull(int x, int y) method of StrictMath class is used to return the exact mathematical product of the two arguments. In the parameters, two integer values are provided and the product of both numbers expressed in long type returned by this method.

Syntax:

public static long multiplyFull(int x, int y)

Parameters: This method accepts two Integer x, y as parameter where x and y are arguments to be multiplied.

Return Value: This method returns long type value which is exact product of X * Y.

Note: This method is added in JDK 9. Hence it won’t run on Online IDE.

Below programs illustrate the multiplyFull() method:

Program 1:

// Java program to demonstrate
// multiplyFull() method of StrictMath class

public class GFG {

    // Main method
    public static void main(String[] args)
    {

        // two Integer values
        int a = 367428, b = 1374;

        // apply multiplyFull method
        long c = StrictMath.multiplyFull(a, b);

        // print result
        System.out.println(a + " * "
                           + b + " = " + c);
    }
}

Output:

367428 * 1374 = 504846072

Program 2: Multiplying two integers contains Integer.MAX values.

// Java program to demonstrate
// multiplyFull() method of StrictMath class

public class GFG {

    // Main method
    public static void main(String[] args)
    {

        // two Integer values
        int a = Integer.MAX_VALUE;
        int b = Integer.MAX_VALUE;

        // apply multiplyFull method
        long c = StrictMath.multiplyFull(a, b);

        // print result
        System.out.println(a + " * "
                           + b + " = " + c);
    }
}

Output:

2147483647 * 2147483647 = 4611686014132420609

References:
https://docs.oracle.com/javase/10/docs/api/java/lang/StrictMath.html#multiplyFull(int, int)