Why doesn’t autoboxing overrule varargs when using method overloading in Java 7?

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I guess it’s related to bug #6886431, which seems to be fixed in OpenJDK 7 as well.

The problem is that JLS 15.12.2.5 Choosing the Most Specific Method
says that one method is more specific than another one when types of formal parameters of the former are subtypes of formal parameters of the latter.

Since int is not a subtype of Object, neither of your methods is the most specific, thus your invocation is ambiguous.

However, the following workaround is possible, because Integer is a subtype of Object:

public void log(Level logLevel, Object... args) { ... }
public void log(Level logLevel, Integer value, Object... args) { ... }

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