Java Math.decrementExact() method

Last Updated : 17 Mar 2025

The java.lang.Math.decrementExact() returns the argument decremented by one. It will throw an exception if the result overflows either int or long.

Syntax

Parameter

Return

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

Example 1

Output:

Example 2

Output:

Example 3

Output:

Exception in thread "main" java.lang.ArithmeticException: integer overflow
	at java.lang.Math.decrementExact(Math.java:943)
	at decrementExactExample3.main(decrementExactExample3.java:7)

Example 4

Output:

Exception in thread "main" java.lang.ArithmeticException: long overflow
	at java.lang.Math.decrementExact(Math.java:960)
	at decrementExactExample4.main(decrementExactExample4.java:7)