What is @ToString used for?

@ToString generates a toString() override that prints the class name followed by each field's name and value, giving a readable default representation instead of Java's default ClassName@hashcode output.

@ToString
public class Person {
    private String name;
    private int age;
}
//  toString() produces: "Person(name=Ada, age=34)"

By default it includes every field, but individual fields can be excluded with @ToString.Exclude — commonly used for sensitive fields (passwords, tokens) that shouldn't end up in logs, or for fields that would make the output unreasonably large or cause infinite recursion (like a reference back to a parent object).

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