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 addExact
method in Java adds its two passed arguments and returns the sum
as a result. The arguments will be either int
or long
. addExact
is a static
method present in the Math
class.
public static long addExact(long a,long b);
public static long addExact(int a, int b);
a
: First value (int
/long
).b
: Second value(int
/long
).Returns the sum of a
and b
.
import java.lang.Math;class AddExactTest {public static void main(String cmdArgs[]) {int a = 10;int b = 10;int sum = Math.addExact(a, b);System.out.print("The sume of "+ a + " and " + b + " is ");System.out.println(sum);long la = 100000000l;long lb = 100000000l;long lsum = Math.addExact(la, lb);System.out.print("The sume of "+ la + " and " + lb + " is ");System.out.println(lsum);}}
In the code above:
We created four variables, a
and b
, of the int
and la
type, and lb
of the long
type.
We called the Math.addExact
method with a
and b
as arguments. This will return the sum of a
and b
as a result.
Again, we called the Math.addExact
method with la
and lb
as arguments. This will return the sum of la
and lb
as a result.
The addExact
method will throw ArithmeticException
if the sum of the arguments is greater than the maximum value type the arguments can hold.
For example, if the two arguments are int
, the ArithmeticException
will be thrown if the sum of two int
arguments is greater than the maximum value int
type can hold.
import java.lang.Math;class AddExactTest {public static void main(String cmdArgs[]) {try{int a = Integer.MAX_VALUE;int b = 1;int sum = Math.addExact(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 1
to the variable b
.
When we call the addExact
method with a
and b
as arguments, we will get ArithmeticException
, because the sum of a
and b
is greater than the value an integer can hold.
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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.