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 subtractExact
method takes two arguments and returns the difference between them. The arguments will be either int
or long
.
subtractExact
is a
Math
class.
public static long subtractExact(long a, long b);
public static int subtractExact(int a, int b);
a
: First value (int
/long
).
b
: Second value, which will be subtracted from first value (int
/long
).
This method returns the difference between a
and b
.
The subtractExact
method is equivalent to:
argument1 - argument2
import java.lang.Math;class SubtractExactTest {public static void main(String cmdArgs[]) {int a = 20;int b = 10;int diff = Math.subtractExact(a, b);System.out.print("The difference of "+ a + " and " + b + " is ");System.out.println(diff);long la = 100l;long lb = 50l;long ldiff = Math.subtractExact(la, lb);System.out.print("The difference of "+ la + " and " + lb + " is ");System.out.println(ldiff);}}
In the code above:
We created four variables, a
and b
, of the int
and la
, and lb
of the long
type.
We called the Math.subtractExact
method with a
and b
as arguments. This will return the difference of a
and b
as result.
Again, we called the Math.subtractExact
method with la
and lb
as arguments. This will return the sum of la
and lb
as a result.
The subtractExact
method will throw ArithmeticException
if:
the arguments are int
and the difference
overflows the int
value.
the arguments are long
and the difference
overflows the long
value.
Consider if the two arguments are int
. The ArithmeticException
will be thrown if the difference 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 SubtractExactTest {public static void main(String cmdArgs[]) {try{int a = Integer.MIN_VALUE;int b = 1;int sum = Math.subtractExact(a, b);}catch(Exception e){System.out.println(e);}}}
In the code above, we have created two variables, a
and b
, of the int
type. We assigned the minimum value an integer can hold to the variable a
, and 1
to the variable b
.
When we call the subtractExact
method with a
and b
as arguments, we will get ArithmeticException
because the difference of a
and b
is less 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.