Grokking Modern System Design Interview for Engineers & Managers
Ace your System Design Interview and take your career to the next level. Learn to handle the design of applications like Netflix, Quora, Facebook, Uber, and many more in a 45-min interview. Learn the RESHADED framework for architecting web-scale applications by determining requirements, constraints, and assumptions before diving into a step-by-step design process.
The multiplyExact
method in Java multiples the two passed arguments and returns the product
of the arguments as a result. The arguments will be either int
or long
.
The multiplyExact
method is a static
method present in the Math
class.
public static long multiplyExact(long a,long b);
public static int multiplyExact(int a, int b);
a
: First value (int
/long
).b
: Second value(int
/long
).The methhod returns the product of a
and b
.
import java.lang.Math;class MultiplyExactTest {public static void main(String cmdArgs[]) {int a = 10;int b = 10;int product = Math.multiplyExact(a, b);System.out.print("The product of "+ a + " and " + b + " is ");System.out.println(product);long la = 100000000l;long lb = 100000000l;long lproduct = Math.multiplyExact(la, lb);System.out.print("The product of "+ la + " and " + lb + " is ");System.out.println(lproduct);}}
In the code above:
We created four variables, a
and b
, of the int
, la
, and lb
of the long
type.
We called the Math.multiplyExact
method with a
and b
as arguments. This will return the product of a
and b
as a result.
Again, we called the Math.multiplyExact
method with la
and lb
as arguments. This will return the product of la
and lb
as a result.
The multiplyExact
method will throw ArithmeticException
if:
The arguments are int
and the product
overflows the int
value.
The arguments are long
and the product
overflows the long
value.
For example, consider if the two arguments are int
. The ArithmeticException
will be thrown if the product of the two int
arguments is less than the minimum value or greater than the maximum value that the int
type can hold.
import java.lang.Math;class MultiplyExactTest {public static void main(String cmdArgs[]) {try{int a = Integer.MAX_VALUE;int b = 2;int product = Math.multiplyExact(a, b);}catch(Exception e){System.out.println(e);}}}
In the code above, we created two variables, a
and b
, of the int
type. We assigned the maximum value an integer can hold to the variable a
, and 2
to the variable b
.
When we call the multiplyExact
method with a
and b
as arguments, we will get ArithmeticException
, because the product of a
and b
is greater than the value an integer can hold.
RELATED TAGS
CONTRIBUTOR
Grokking Modern System Design Interview for Engineers & Managers
Ace your System Design Interview and take your career to the next level. Learn to handle the design of applications like Netflix, Quora, Facebook, Uber, and many more in a 45-min interview. Learn the RESHADED framework for architecting web-scale applications by determining requirements, constraints, and assumptions before diving into a step-by-step design process.