Junior — Middle
При выполнении программы происходит преобразование ссылки или объекта к его конкретному типу, известному во время выполнения или компиляции. Что это за процесс?
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Answer from AI
This process is called type casting or casting. In Java, type casting allows converting an object or reference to another type, known at compile-time or runtime.
There are two main types of casting:
- Explicit cast: the programmer explicitly specifies the type to which the object should be cast.
- Implicit cast: occurs automatically, for example, when assigning a value of a smaller type to a variable of a larger type.
Example of explicit casting:
Object obj = "Hello";
String str = (String) obj; // casting object to String type
If the cast is incorrect, a ClassCastException may occur at runtime. Therefore, it is important to check the type using the instanceof operator before casting.