有没有一种方法可以解决模棱两可的方法调用而无需强制转换? [英] Is there a way to work around Ambiguous method call without casting?

问题描述

我有以下代码:

public static void main(String[] args) throws Exception {
    test(new LinkedList());
}

public static void test(Queue qeueue){
    System.out.println("Queue");
}

public static void test(List list){
    System.out.println("List");
}

InteliJ不允许我运行该项目.

InteliJ is not letting me run the project.

1. 有什么办法可以解决此问题?
2. 如果两者的特异性相同，那么JVM将使用这两个中的哪个?是随机的吗?

我已经阅读了相关的SO q/a，但是没有人给出如何围绕它进行编译的答案. 他们只列出了原因，例如歧义方法调用intelliJ 15

I have read related SO q/a but no one gives an answer how to compile around it. They just list the reason, e.g. Ambiguous method call intelliJ 15

一个更讨厌的例子是:

test(null);

我一直在阅读非常有趣的文章: http: //javabypatel.blogspot.be/2016/05/ambiguous-method-overloading.html

I have been reading the article that is quite interesting: http://javabypatel.blogspot.be/2016/05/ambiguous-method-overloading.html

推荐答案

一个LinkedList既是List又是Deque，而Deque又是Queue.

A LinkedList both a List and a Deque, which in turn is a Queue.

test方法的调用因此对于编译器是模棱两可的，因为无法确定要调用的重载.

The test method invocation is therefore ambiguous to the compiler, as there is no way to figure which overload to invoke.

要么合并方法以接受唯一对象(例如，Collection)，要么显式转换为任一目标类型(或完全具有不同的方法名称).

Either merge the methods to accept a unique object (e.g. a Collection), or explicitly cast to either target type (or, have different method names altogether).

还请记住:不鼓励使用原始类型，您可能希望对通用集合进行参数化.

Also remember: it is discouraged to use raw types, you probably want to parametrize your generic collections.

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