lombok

Annotation Type NoArgsConstructor

@Target(value=TYPE)
 @Retention(value=SOURCE)
public @interface NoArgsConstructor

Generates a no-args constructor. Will generate an error message if such a constructor cannot be written due to the existence of final fields.

Complete documentation is found at the project lombok features page for @Constructor.

Even though it is not listed, this annotation also has the onConstructor parameter. See the full documentation for more details.

NB: Fields with constraints such as @NonNull will NOT be checked in a @NoArgsConstructor constructor, of course!

See Also:

RequiredArgsConstructor, AllArgsConstructor

Optional Element Summary

Optional Elements

Modifier and Type	Optional Element and Description
AccessLevel	access Sets the access level of the constructor.
boolean	force If true, initializes all final fields to 0 / null / false.
NoArgsConstructor.AnyAnnotation[]	onConstructor Any annotations listed here are put on the generated constructor.
String	staticName If set, the generated constructor will be private, and an additional static 'constructor' is generated with the same argument list that wraps the real constructor.

Element Detail

staticName

public abstract String staticName

If set, the generated constructor will be private, and an additional static 'constructor' is generated with the same argument list that wraps the real constructor. Such a static 'constructor' is primarily useful as it infers type arguments.

Returns:

Name of static 'constructor' method to generate (blank = generate a normal constructor).

Default:

""

onConstructor

public abstract NoArgsConstructor.AnyAnnotation[] onConstructor

Any annotations listed here are put on the generated constructor. The syntax for this feature depends on JDK version (nothing we can do about that; it's to work around javac bugs).
up to JDK7:
@NoArgsConstructor(onConstructor=@__({@AnnotationsGoHere}))
from JDK8:
@NoArgsConstructor(onConstructor_={@AnnotationsGohere}) // note the underscore after onConstructor.

Returns:

List of annotations to apply to the generated constructor.

Default:

{}

access

public abstract AccessLevel access

Sets the access level of the constructor. By default, generated constructors are public.

Returns:

The constructor will be generated with this access modifier.

Default:

lombok.AccessLevel.PUBLIC

force

public abstract boolean force

If true, initializes all final fields to 0 / null / false. Otherwise, a compile time error occurs.

Returns:

Return true to force generation of a no-args constructor, picking defaults if necessary to assign required fields.

Default:

false