Simpler method to autobox / cast a Long to int in java

Question

I've the following code in Java:

void foo(int a) { ... }

void bar() {
    Long x = 42;
    foo(x);  // Compile error: "Method foo(int)   
             // is not applicable for the argument (long)"
    foo((long) x); // Same as before
    foo((int) x); // Compile error: "Cannot cast Long to int"
    foo((int) (long) x);  // OK, but strange and confusing
}

Is there a better way?

Try `foo(x.intValue())`. Also, `Long x = 42;` won't compile. — Sotirios Delimanolis, Oct 01 '13 at 17:41
related: http://stackoverflow.com/questions/1590831/safely-casting-long-to-int-in-java?rq=1 — , Oct 01 '13 at 17:43
@RC. In real-life I do not control `x` and `foo()` -- that's the point of my question: I have to somehow down-cast. — Laurent Grégoire, Oct 28 '13 at 15:56

score 2 · Accepted Answer · answered Oct 01 '13 at 17:41

2

If you have a Long object, you can call the intValue() method to get an int.

answered Oct 01 '13 at 17:41

rgettman

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score 0 · Answer 2 · answered Oct 01 '13 at 17:42

0

Declare your x as a long, not a Long, and you will be able to cast directly to (int)

answered Oct 01 '13 at 17:42

codethulhu

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Simpler method to autobox / cast a Long to int in java

2 Answers2