What are the advantages and disadvantages of using generics in Java?

Advantages of generics in Java:

• Type safety: allows catching type errors at compile time, reducing the number of ClassCastException at runtime.
• Code reuse: you can write universal classes and methods that work with different data types.
• Readability and maintainability: code becomes clearer as types are explicitly specified.

Disadvantages:

• Type erasure: at runtime, information about generic types is absent, which limits reflection capabilities and the creation of parameterized type instances.
• Syntax complexity: generics can be difficult for beginners to understand.
• Restrictions on primitive types: primitives cannot be used directly, only their wrappers (e.g., Integer instead of int).

Example of using a generic class:

public class Box<T> {
    private T value;
    public void set(T value) { this.value = value; }
    public T get() { return value; }
}

Box<String> stringBox = new Box<>();
stringBox.set("Hello");
String s = stringBox.get();