我們應該@Override接口的方法實現嗎？

本文翻譯自：Should we @Override an interface's method implementation?

Should a method that implements an interface method be annotated with @Override ? 是否應該使用@Override註釋實現接口方法的方法？

The javadoc of the Override annotation says: Override註釋的javadoc說：

Indicates that a method declaration is intended to override a method declaration in a superclass. 指示方法聲明旨在覆蓋超類中的方法聲明。 If a method is annotated with this annotation type but does not override a superclass method, compilers are required to generate an error message. 如果使用此批註類型註釋方法但不覆蓋超類方法，則編譯器需要生成錯誤消息。

I don't think that an interface is technically a superclass. 我不認爲接口在技術上是超類。 Or is it? 或者是嗎？

Question Elaboration 問題詳述

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#1樓

參考：https://stackoom.com/question/tJG/我們應該-Override接口的方法實現嗎

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#2樓

You should use @Override whenever possible. 你應該儘可能使用@Override。 It prevents simple mistakes from being made. 它可以防止出現簡單的錯誤。 Example: 例：

class C {
    @Override
    public boolean equals(SomeClass obj){
        // code ...
    }
}

This doesn't compile because it doesn't properly override public boolean equals(Object obj) . 這不會編譯，因爲它沒有正確覆蓋public boolean equals(Object obj) 。

The same will go for methods that implement an interface ( 1.6 and above only ) or override a Super class's method. 對於實現接口（ 僅限1.6及更高版本 ）或覆蓋超類的方法的方法也是如此。

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#3樓

I would use it at every opportunity. 我會抓住每個機會。 See When do you use Java's @Override annotation and why? 請參閱何時使用Java的@Override註釋以及爲什麼？

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#4樓

I believe that javac behaviour has changed - with 1.5 it prohibited the annotation, with 1.6 it doesn't. 我相信javac的行爲已經改變了 - 用1.5它禁止了註釋，而1.6則沒有。 The annotation provides an extra compile-time check, so if you're using 1.6 I'd go for it. 註釋提供額外的編譯時檢查，所以如果你使用1.6，我會去做。

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#5樓

Overriding your own methods inherited from your own classes will typically not break on refactorings using an ide. 覆蓋從您自己的類繼承的自己的方法通常不會使用ide在重構上中斷。 But if you override a method inherited from a library it is recommended to use it. 但是如果重寫從庫繼承的方法，建議使用它。 If you dont, you will often get no error on a later library change, but a well hidden bug. 如果你不這樣做，你通常會在以後的庫更改中沒有錯誤，但是一個隱藏得很好的錯誤。

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#6樓

當您在創建實現接口的類期間告訴它“生成未實現的方法”時，Eclipse本身將添加@Override註釋。