java - 拳击+Varargs 优于拳击+加宽

Question

如有错误，请指正。Boxing+Varargs 是否优于 Boxing+Widening？

我在site中找到了那是另一种方式。

Answer 1

当多个可以符合条件时调用什么方法在 JLS #15.2.2 中定义:

The first phase (§15.12.2.2) performs overload resolution without permitting boxing or unboxing conversion, or the use of variable arity method invocation. If no applicable method is found during this phase then processing continues to the second phase.

The second phase (§15.12.2.3) performs overload resolution while allowing boxing and unboxing, but still precludes the use of variable arity method invocation. If no applicable method is found during this phase then processing continues to the third phase.

The third phase (§15.12.2.4) allows overloading to be combined with variable arity methods, boxing, and unboxing.

总结一下:加宽 > 装箱&拆箱 > 可变参数