英文:
How to Add Annotations to Parent Method in Java Without Overriding It?
问题
In Java，如何在不更改方法主体的情况下向父方法添加注释？
例如：
public class ParentClass {
public void someMethod() {
System.out.println("Hello world");
}
}
public class ChildClass extends ParentClass {
// 在someMethod上添加@Deprecated注释，而不更改其主体
}
我需要保持方法不变，唯一的区别是现在它有一个注释。我该如何做？
我尝试过不包括方法主体，例如：
public class ChildClass extends ParentClass {
@Override
@Deprecated
public void someMethod();
}
这不起作用。我也尝试过不使用@Override注释，但似乎它期望方法将具有主体。是否有一种方法只是添加注释而不更改其实际值？
英文:
In Java, how can I add an annotation to a parent method without changing the body of the method.
For example:
public class ParentClass {
public void someMethod() {
System.out.println("Hello world");
}
}
public class ChildClass extends ParentClass {
// Add the @Deprecated annotation to someMethod, without changing its body
}
I need the method to remain the same, but the only difference is now it has an annotation. How would I do this?
I have tried not including a body to the method, ie:
public class ChildClass extends ParentClass {
@Override
@Deprecated
public void someMethod();
}
This doesn't work. I have also tried not using the @Override annotation, but it seems to expect that the method will have a body. Is there a way to just add the annotation without changing its actual value?
答案1
得分: 1
如果我理解正确，您可以这样做：
public class ChildClass extends ParentClass {
@Override
@Deprecated
public void someMethod() {
super.someMethod();
}
}
然而，在这里，只有在声明为 ChildClass 的对象上调用 someMethod 才会被视为对已弃用方法的调用。在声明为 ParentClass 的对象上调用 someMethod（即使实际上是一个 ChildClass 对象）不会被视为已弃用的方法调用。
英文:
If I understood correctly, you can do it like that:
public class ChildClass extends ParentClass {
@Override
@Deprecated
public void someMethod() {
super.someMethod();
}
}
However, here only calling someMethod on an object declared as ChildClass would be considered as call of a deprecated method. Calling someMethod on an object declared as ParentClass (even if it's actually an ChildClass object) wouldn't be seen as a deprecated method call.
答案2
得分: 0
你可以这样写：
public class ChildClass extends ParentClass {
@Override
@Deprecated
public void someMethod(){
super.someMethod();
}
}
英文:
You can write like this
public class ChildClass extends ParentClass {
@Override
@Deprecated
public void someMethod(){
super.someMethod();
}
}
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