What is @Value used for?

@Value is the immutable counterpart to @Data: it makes the class and all its fields final by default, generates getters (but no setters), a constructor covering every field, toString(), and equals()/hashCode() — producing a fully immutable value object from a single annotation.

@Value
public class Point {
    int x;
    int y;
}
//  fields become private final; only getters are generated, no setters;
//  class itself becomes final

It's the right fit for genuinely immutable value types (coordinates, money amounts, identifiers) where you want the compiler to enforce that instances can't change after construction, rather than relying on discipline to avoid calling setters that technically exist, as would be the case with a mutable @Data class.

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