Why does autoboxing make some calls ambiguous in Java?

Question

I noticed today that auto-boxing can sometimes cause ambiguity in method overload resolution. The simplest example appears to be this:

public class Test {
           


        

Answer 1

So why did the overload resolution fail? Why didn't the compiler auto-box the first argument, and accept the second argument normally? Why did I have to request auto-boxing explicitly?

It didn't accept the second argument normally. Remember that "boolean" can be boxed to an Object too. You could have explicitly cast the boolean argument to Object as well and it would have worked.