Safely casting long to int in Java

In Java, you can safely cast a long value to an int by checking to see if the long value is within the range of the int data type. If the long value is too large to be stored in an int, you can use another data type (such as a long or a BigInteger) to store the value.

Here is an example of how you can safely cast a long value to an int in Java:

long longValue = 1234567890;

if (longValue < Integer.MIN_VALUE || longValue > Integer.MAX_VALUE) {
    // long value is too large to be stored in an int
    // handle error or use another data type to store the value
} else {
    // safe to cast long to int
    int intValue = (int) longValue;
}

Alternatively, you can use Math.toIntExact() to safely convert a long to an int. This method throws an ArithmeticException if the value is outside the int range:

long longValue = 1234567890;
int intValue = Math.toIntExact(longValue);

Keep in mind that if you cast directly without checking the range (e.g., int intValue = (int) longValue;), Java will truncate the higher 32 bits, which may result in an unexpected value or sign change.