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Java Program to add integers and check for overflow
To check for Integer overflow, we need to check the Integer.MAX_VALUE with the added integers result, Here, Integer.MAX_VALUE is the maximum value of an integer in Java.
Let us see an example wherein integers are added and if the sum is more than the Integer.MAX_VALUE, then an exception is thrown.
Example
public class Demo {
public static void main(String[] args) {
int a = 9897988;
int b = 8798798;
System.out.println("Value1: "+a);
System.out.println("Value2: "+b);
long sum = (long)a + (long)b;
if (sum > Integer.MAX_VALUE) {
throw new ArithmeticException("Integer Overflow!");
}
// displaying sum
System.out.println("Sum: "+(int)sum);
}
}Output
Value1: 9897988 Value2: 8798798 Sum: 18696786
In the above example, we have taken the following two integers.
int val1 = 9897988; int val2 = 8798798;
Now we will cast and add them to a long.
long sum = (long)val1 + (long)val2;
If the result is more than the maximum value, then an exception is thrown.
If (sum > Integer.MAX_VALUE) {
throw new ArithmeticException("Overflow!");
}
Updated on: 26-Jun-2020
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