Are anonymous classes in Java necessarily final classes?

No, anonymous classes in Java are not necessarily final classes. An anonymous class is final by default, but can be made non-final by using the abstract modifier or declaring non-final fields to enable subclassing or modify its internal state.

Are anonymous classes in Java necessarily final classes?

Answer: No, anonymous classes in Java are not necessarily final classes.

Detailed explanation:

Anonymous class is an anonymous inner class in Java programming. It has no class name, but uses new directly. Keyword creation. By default, an anonymous class is final, but you can make it non-final by:

• Use the abstract modifier in the anonymous class definition:

Runnable runnable = new Runnable() {
    @Override
    public void run() {
        // ...
    }
};

• Declare a non-final field in an anonymous class definition:

Object object = new Object() {
    int value;
};

Since non-final classes can be subclassed or have their internal state modified, use them when these features are needed Non-final anonymous classes are useful. However, in most cases this is not recommended as it makes the code harder to understand and maintain.

Generally speaking, anonymous classes should be kept final to ensure their immutability and prevent unnecessary modifications.

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