Convert Long into Integer

Question

How to convert a Long value into an Integer value in Java?

Answer 1

In addition to @Thilo's accepted answer, Math.toIntExact works also great in Optional method chaining, despite it accepts only an int as an argument

Long coolLong = null;
Integer coolInt = Optional.ofNullable(coolLong).map(Math::toIntExact).orElse(0); //yields 0