How can I prevent a ClassCastException when implementing the Decorator design pattern?

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To prevent a ClassCastException when implementing the Decorator design pattern in Java, you should ensure that the decorators and the object being decorated implement the same interface or inherit from the same class. This will ensure that they are of the same type and can be cast to each other without any issues.

Additionally, you should also ensure that the type of the decorator matches the type of the object being decorated. For example, if you have a decorator that adds a new method to the object being decorated, you should make sure that the type of the decorator is compatible with the object's original type.

Finally, you can also use the instanceof operator to check the type of the object before casting it to the decorator type. This will help you catch any potential casting errors before they occur.