How can I convert a long to int in Java?

Question

How can I convert a long to int in Java?

Answer 1

long x = 3;
int y = (int) x;

but that assumes that the long can be represented as an int, you do know the difference between the two?

Answer 2

You can use the Long wrapper instead of long primitive and call

Long.intValue()

Java7 intValue() docs

It rounds/truncate the long value accordingly to fit in an int.

Answer 3

If using Guava library, there are methods Ints.checkedCast(long) and Ints.saturatedCast(long) for converting long to int.

Answer 4

If direct casting shows error you can do it like this:

Long id = 100;
int int_id = (int) (id % 100000);