Java方法签名的定义

r囧r小猫 2022-12-06 15:37 137阅读 0赞

In [Java][], a method signature is part of the method declaration. It's the combination of the method name and the [parameter][] list.

在[Java中][Java] ，方法签名是方法声明的一部分。 它是方法名称和[参数][parameter]列表的组合。

The reason for the emphasis on just the method name and parameter list is because of [overloading][]. It's the ability to write methods that have the same name but accept different parameters. The Java compiler is able to discern the difference between the methods through their method signatures.

只强调方法名称和参数列表的原因是由于[重载][overloading] 。 可以编写名称相同但接受不同参数的方法。 Java编译器能够通过它们的方法签名来识别方法之间的差异。

## 方法签名示例 **(** Method Signature Examples **)** ##

public void setMapReference(int xCoordinate, int yCoordinate){ //method code}

The method signature in the above example is *setMapReference(int, int).* In other words, it's the method name and the parameter list of two integers.

上例中的方法签名为*setMapReference(int，int)。* 换句话说，它是方法名称和两个整数的参数列表。

public void setMapReference(Point position){ //method code}

The Java compiler will let us add another method like the above example because its method signature is different, *setMapReference(Point)* in this case.

Java编译器将让我们添加与上述示例类似的另一个方法，因为它的方法签名不同，在这种情况下为*setMapReference(Point)* 。

public double calculateAnswer(double wingSpan, int numberOfEngines, double length, double grossTons) {   //method code}

In our last example of a Java method signature, if you follow the same rules as the first two examples, you can see that the method signature here is *calculateAnswer(double, int, double, double)*.

在我们的Java方法签名的最后一个示例中，如果遵循与前两个示例相同的规则，则可以看到此处的方法签名为*calculateAnswer(double，int，double，double)* 。

> 翻译自: [https://www.thoughtco.com/method-signature-2034235][https_www.thoughtco.com_method-signature-2034235]

[Java]: https://www.thoughtco.com/what-is-java-2034117
[parameter]: https://www.thoughtco.com/parameter-2034268
[overloading]: https://www.thoughtco.com/overloading-2034261
[https_www.thoughtco.com_method-signature-2034235]: https://www.thoughtco.com/method-signature-2034235