Java Math.negateExact() method returns negation of the argument. If the given argument is positive, it returns the same argument with negative sign and vice versa.
public class JavaExample
{
public static void main(String[] args)
{
int i = 151; //integer
long l = -140056L; //long
System.out.println(Math.negateExact(i));
System.out.println(Math.negateExact(l));
}
}
Output:
-151 140056
Syntax of negateExact() Method
Math.negateExact(-56); //returns 56
negateExact() Description
public static int negateExact(int num): It returns the negation of integer argument num. It throws ArithmeticException, if the argument value is Integer.MIN_VALUE.
public static long negateExact(long num): It returns the negation of long argument num. It throws ArithmeticException, if the argument value is Long.MIN_VALUE.
Note: The exception occurs because negation of Integer.MIN_VALUE or Long.MIN_VALUE overflows the int and long respectively.
negateExact() Parameters
- num: The int or long argument whose negation value is to be determined.
negateExact() Return Value
- Returns the negation of given argument
num.
Example 1: Negation of integer value
public class JavaExample
{
public static void main(String[] args)
{
int num = 77;
System.out.println(Math.negateExact(num));
}
}
Output:
Example 2: Negation of long value
public class JavaExample
{
public static void main(String[] args)
{
long num = 4500678L;
System.out.println(Math.negateExact(num));
}
}
Output:
Example 3: Integer overflow while calling negateExact()
public class JavaExample
{
public static void main(String[] args)
{
int num = Integer.MIN_VALUE;
System.out.println(Math.negateExact(num));
}
}
Output:
Example 4: Long overflow while calling negateExact()
public class JavaExample
{
public static void main(String[] args)
{
long num = Long.MIN_VALUE;
System.out.println(Math.negateExact(num));
}
}
Output:
