java - 什么时候使用Java的@Override注释，为什么？(When do you use Java's @Override annotation and why?)

Question

What are the best practices for using Java's @Override annotation and why?

(使用Java的@Override注释的最佳实践是什么，为什么？)

It seems like it would be overkill to mark every single overridden method with the @Override annotation.

(用@Override注释标记每个被覆盖的方法似乎是多余的。)

Are there certain programming situations that call for using the @Override and others that should never use the @Override ?

(是否有某些编程情况要求使用@Override而另一些则永远不要使用@Override ？)

  ask by Alex B translate from so

Answer 1

Use it every time you override a method for two benefits.

(每次您重写一种方法都有两个好处时使用它。)

Do it so that you can take advantage of the compiler checking to make sure you actually are overriding a method when you think you are.

(这样做是为了使您能够利用编译器检查的优势，以确保您认为自己确实覆盖了某个方法。)

This way, if you make a common mistake of misspelling a method name or not correctly matching the parameters, you will be warned that you method does not actually override as you think it does.

(这样，如果您犯了拼写错误的方法名称或不正确匹配参数的常见错误，将会警告您方法实际上并没有像您认为的那样覆盖。)

Secondly, it makes your code easier to understand because it is more obvious when methods are overwritten.

(其次，它使您的代码更易于理解，因为当方法被覆盖时，它更加明显。)

Additionally, in Java 1.6 you can use it to mark when a method implements an interface for the same benefits.

(另外，在Java 1.6中，您可以使用它来标记方法何时实现接口以实现相同的好处。)

I think it would be better to have a separate annotation (like @Implements ), but it's better than nothing.

(我认为最好有一个单独的注释（例如@Implements ），但总比没有好。)