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https://issues.apache.org/jira/browse/GROOVY-7933?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15485466#comment-15485466
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Jose Ignacio Acin Pozo commented on GROOVY-7933:
------------------------------------------------

Of course, your resolution makes more sense. I was not taking into account the 
widening possibility, just the boxed/unboxed possibilities for an Integer.

I think you meant:

{code}
​class Demo {
    String a(int i) { 'int' }
    String a(Integer bigI) { 'Integer' }

    void test() {
        String result = a(42)
        // 'int' instead of 'Integer'
        assert result == 'int'
    }

    static void main(args) {
        String result = new Demo().a(42)
        assert result == 'Integer'
        
        new Demo().test()
    }
}

{code}

This behaviour is way too confusing and I wonder how it went unnoticed for so 
many years, or if there was a real reason indeed for doing it this way and it 
is just not documented/explained properly.




> Incorrect boxing of boolean primitive types
> -------------------------------------------
>
>                 Key: GROOVY-7933
>                 URL: https://issues.apache.org/jira/browse/GROOVY-7933
>             Project: Groovy
>          Issue Type: Bug
>          Components: groovy-runtime
>    Affects Versions: 2.4.7
>            Reporter: Henri Tremblay
>
> A boolean primitive type seems to be boxed for no apparent reason. See the 
> example below. The problem disappear when using @CompileStatic or if 
> explicitly casting to (boolean).
> {code:java}
> public class Demo {
>    public void a(boolean a){
>        System.out.println("boolean was called");
>    }
>    public void a(Object a){
>        System.out.println("Object was called");
>    }
> }
> class Groovy {
>    static void main(String[] args) {
>        def demo = new Demo()
>        demo.a(true)
>    }
> }
> {code}
> *Output:*
> Object was called



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