Is autoboxing possible for the classes I create?

Question

Is there any way to use autoboxing for the classes I create? For example, I have this subclass of Number.

public class UnsignedInteger extends N         


        

Answer 1

If you use Groovy, you can set the boolean behavior by implementing the asBoolean method: http://groovy-lang.org/semantics.html#_customizing_the_truth_with_asboolean_methods

Example:

class Color {
    String name

    boolean asBoolean(){
        name == 'green' ? true : false
    }
}

assert new Color(name: 'green')
assert !new Color(name: 'red')

I know this is not plain Java but compiles to bytecode and runs on the JVM.