Java Math.negateExact() method

The java.lang.Math.negateExact() returns the negation of the argument. It will throw an exception if the result overflows either int or long.

Syntax

public static int negateExact (int a) 
public static long negateExact (long a)

Parameter

Return

If the argument is Integer.MIN_VALUE or Long.MIN_VALUE, it will throw an ArithmeticException.

Example 1

public class NegateExactExample1
{
    public static void main(String[] args) 
    {
        int a = 379;
        // Input a, Output -a
        System.out.println(Math.negateExact(a));
    }
}

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Output:

-379

Example 2

public class NegateExactExample2
{
    public static void main(String[] args) 
    {
        long a = -830;
        // Input -a, Output a
        System.out.println(Math.negateExact(a));
    }
}

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Output:

Example 3

public class NegateExactExample3
{
    public static void main(String[] args) 
    {
        int a = Integer.MIN_VALUE;
        // Input int overflow, Output ArithmeticException
        System.out.println(Math.negateExact(a));
    }
}

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Output:

Exception in thread "main" java.lang.ArithmeticException: integer overflow
	at java.lang.Math.negateExact(Math.java:977)
	at negateExactExample3.main(negateExactExample3.java:7)

Example 4

public class NegateExactExample4
{
    public static void main(String[] args) 
    {
        long a = Long.MIN_VALUE;
        // Input long overflow, Output ArithmeticException
        System.out.println(Math.negateExact(a));
    }
}

Test it Now

Output:

Exception in thread "main" java.lang.ArithmeticException: long overflow
	at java.lang.Math.negateExact(Math.java:994)
	at negateExactExample4.main(negateExactExample4.java:7)

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