Question

Is it safe to cast a long to an int in Java?

For some reason, the following code , I get ‘-1’ as anIntVar. And I have checked ‘aLongVar’ is not an -1.

public static final long CONST = 1000 * 62;

long aLongVar
int anIntVar =  (int)(aLongVar/ CONST);

Answer 1

No, its not safe. Don’t do it. Because, A Long / long has 64 bit and can hold much more data than an Integer / int has 32 bit only. Doing the conversion will result in loss of information.

If at all you wish to do it, do like this

Use the .intValue() to convert the Long value to an int value.