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Java - Math.toIntExact() Examples

Java Java API 

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Class:

java.lang.Math

java.lang.Objectjava.lang.Objectjava.lang.Mathjava.lang.MathLogicBig

Method:

public static int toIntExact(long value)

Returns the value of the long argument; throwing an exception if the value overflows an int.

Parameters:
value - the long value
Returns:
the argument as an int
Throws:
java.lang.ArithmeticException,ArithmeticException - if the argument overflows an int
Since:
1.8


Examples


package com.logicbig.example.math;

public class ToIntExactExample {

    public static void main(String... args) {
        intExact(0);
        intExact(253);
        intExact(785);
        intExact(02);
        intExact(57);
        intExact(Long.MAX_VALUE);
    }

    private static void intExact(long value) {
        System.out.println("----------");
        int i = (int) value;
        System.out.printf("Without Math.toIntExact of %s = %s %n", value, i);

        try {
            int degree = Math.toIntExact(value);
            System.out.printf("Math.toIntExact(%s)= %s %n", value, degree);
        } catch (ArithmeticException e) {
            System.out.println("error: " + e);
        }
    }
}

Output

----------
Without Math.toIntExact of 0 = 0 
Math.toIntExact(0)= 0 
----------
Without Math.toIntExact of 253 = 253 
Math.toIntExact(253)= 253 
----------
Without Math.toIntExact of 785 = 785 
Math.toIntExact(785)= 785 
----------
Without Math.toIntExact of 2 = 2 
Math.toIntExact(2)= 2 
----------
Without Math.toIntExact of 57 = 57 
Math.toIntExact(57)= 57 
----------
Without Math.toIntExact of 9223372036854775807 = -1 
error: java.lang.ArithmeticException: integer overflow

See Also