rest. All you need to define is how to manually collect the result of the conversion. 2 (and above) using the new (experimental) annotation @SuperBuilder. class); // Mappings entity to dto / dto to entity Dec 5, 2017 · mapstruct-processor は Annotation Processor の処理が含まれています。実装時に参照するクラス群は mapstruct-jdk8 に含まれています。 mapstruct はまだ完全に枯れているようには見えないライブラリなのでバージョンごとに振る舞いの差があります。 Jun 1, 2018 · Imagine a target abstract class CarEntity with two subclasses SUV and City and a source class CarDto with a discriminator field type with two enumeration constants SUV and CITY. If you want to just get a reference to mapper you can use. Ambiguous mapping methods using java Mapstruct. Provide details and share your research! But avoid …. But in my case I work with immutable objects. Abstract Class. We will discuss the benefits of using MapStruct, including its ability to generate code at compile-time, eliminating the overhead of runtime reflection. @Mapper. 12 AssertJ : 3. DeviceService deviceService; public static DeviceDataMapper INSTANCE = Mappers. You mapper would look like: @Mapper (componentModel = "spring") public abstract class RequestMapper { @Mapping (target = "Id", source = "Id") @Mapping (target = "data", source = "variables") public May 30, 2024 · Methods in an interface are implicitly abstract if they are not static or default and all are public. public class CustomMapper {. public interface CategoryMapper {. Interface vs. e. MapStruct is a library that helps us to minimize boilerplate code when dealing with Java Beans mapping. Oct 16, 2021 · Step 3: Mapper class should have be annotated with @Mapper annotation @Mapper(componentModel = "spring") @Service public interface PersonMapper { // add appropriate mapper methods } Step 3: Update maven project & run. MapStruct is a Java annotation processor for the generation of type-safe bean mapping classes. What you have defined with: public interface AMapper {. Project Lombok is an annotation processor that (amongst other things) adds getters and setters to the AST (abstract syntax tree) of compiled bean classes. missionSetToTreeDtoSet( set ); Mar 29, 2019 · 2. This was my older solution (It is a simple example) @Mapper. Feb 1, 2018 · I want to convert String to enum using mapstruct. This guide covers all the functionality provided by MapStruct. As you have noticed in order JPA to perform the save correctly you need to set the link to the config in the ConfigHeader. In this tutorial, we’ll learn how to construct complex mappers built with simple ones and map nested structures. Jul 11, 2018 · Target class: class Parameters { private String group; private String name; private String value; // getters and setters omitted } Is it possible using MapStruct to convert a ReportSettings object to List<Parameters> object like below where the field names from the ReportSettings class are mapped to the Parameter class's group field: Mar 2, 2018 · So that when MapStruct sees during the mapping that when mySource. I understand that being an abstract class it should indicate which of the implementations to use, but I don't Nov 17, 2021 · That is correct. class ); answered Jan 30, 2023 at 19:04. So it needs to know which types to construct in order to generate a method implementation. For abstract classes or decorators setter injection should be used. In addition, the component = "spring" is instructing mapstruct to make both of these mappers autowired in their counterpart class thus resulting in the dependency issue that doesn't exist in the example. mock(My. Instead I have used the custom method in my mapper to resolve this issue. Mar 13, 2021 · With MapStruct, I created a mapper that is an abstract class. May 25, 2018 · What you can do instead is to use the @Context and perform your logic in it. For this you need to add in your Config something like: Nov 30, 2015 · Object input; Which, in runtime, returns a custom object named TicketDetails. Aug 4, 2020 · The solution was to use a Decorator as suggested in this answer. mvn clean install. Having said that, you could do this smarter by using a base mapping method on which you define all the @Mapping annotations and ignore the generic type mapping. Mapstruct is a code generator. 1 使用するBean public class Person { private String name; private int age; // constructor/getter… Mar 26, 2020 · How do i use MapStruct mapping for this case? abstract class Person: private String name; private String somethingToIgnore. getMapper (SubClassMapper. It needs to be extended and its method implemented. I deciced to transform the mapper from interface to abstract, in order to use a component names AddressConverter that itself is using a component named CountryService. To format the data for readability and more integration, I have used Mapstruct. entity. May 18, 2020 · Since MapStuct don't know how to map a String to Role, you have to explicite define the mapping role. Illustration of Abstract class. I would like to do mapping of nested object that needs value from the parent object. mainAnimal is a DogDTO, mapstruct does not implicitly convert that into an AnimalDTO. propA has the value "ABC" myTarget. These are methods which need to be implemented by the class extending the abstract class. What you could do is to use an abstract class. I'm looking at how to be able to test them via Junit Test ? Nov 28, 2023 · After the build, while mapping the list AnotherJavaClassInProto in the class generated by MapStruct, I'm applying the following method to create a new list from AnotherJavaClassInProto found inside the proto: Jul 25, 2019 · CreatePersonMapper INSTANCE = Mappers. There are 2 ways you can achieve this: First option: You can use CollectionMappingStrategy#ADDER_PREFERRED (see more here ). I can add the objectFactory for Axis class but how can I map all 3 different concrete classes by single objectFactory. This is possible with lombok 1. During compilation, MapStruct will generate an implementation of this interface. class, Answers. Jun 9, 2017 · So whenever you want to use CompanyMapper than you only need to autowired it as we use @Mapper(componentModel = "spring") so spring boot can able to inject this. It generates mappers using only provided interfaces. propX needs to be set to value "XYZ" and so forth. An abstract class is nothing but a class that is declared using the abstract keyword. java. @MapperConfig(. Due to "business" "logic", I need to constrain notificationPeriod and schedulePeriod to a Lecture's start and end field values. public class OrderMappingContext {. CONSTRUCTOR, componentModel = "spring", uses = {TransactionMapper. xml: To see the auto-generated methods inside the project’s target folder, we have to add the annotationProcessorPaths to the maven-compiler-plugin plugin: 3. MapStruct will not inject mappers from Mapper#uses if they are not used by MapStruct. If this all fails MapStruct tries to do a number of 2 step approaches: mapping method - mapping method. class) can be used to automatically inject objects Sep 26, 2023 · What is Abstract Class in Java? Java abstract class is a class that can not be initiated by itself, it needs to be subclassed by another class to use its properties. AUTO_INHERIT_FROM_CONFIG. mappingInheritanceStrategy = MappingInheritanceStrategy. It also allows us to declare method signatures May 11, 2024 · By using a custom mapper with MapStruct, we can customize the default mapping methods. Provide a non abstract / non interface result type or a factory method. Typically, the generated code will loop over the Nov 25, 2019 · 6. You can have @AfterMapping and @BeforeMapping in your context where you can store the Order id and use that during its execution. type conversion - mapping method. Now, in my target class there is a attribute named, MyTicket myTicket; which, I need to map with an attribute of TicketDetails object. When you are using Lombok builder and mapstruct together. ) public interface ParentConfig {. Here's how I wrote Mapper. Introduction. g. Abstract class in Java. Let’s add the mapstruct library into our Maven pom. If you use @Context you'll have to pass it to all the methods you need. We will also examine how MapStruct helps How can I inject ReadProcessor class while writing test case for BookMapper BookMapper. Here is what I've come up to, using another class: The abstract keyword is a non-access modifier, used for classes and methods: Abstract class: is a restricted class that cannot be used to create objects (to access it, it must be inherited from another class). 👍 2. First, we have to specifiy the Decorator in the Mapper: @Mapper(componentModel = "spring", unmappedTargetPolicy = ReportingPolicy. IGNORE) public abstract class AggregatorMapper {. getMapper(AMapper. Specifies a decorator to be applied to a generated mapper, which e. class}) public interface PostMapper { // since the author attribute on postDTO is a String, we use mapstruct to find // within our database the matching user to that username and return the user object @Mapping(source Introduction. Returns: The conversion string from source to target; defaultFormatterSuffix protected abstract String defaultFormatterSuffix() getFromExpression Dec 1, 2021 · In this case you do not need to manually define the injection, because all the actions on the injected class are handled by MapStruct. Dec 29, 2021 · Thanks for contributing an answer to Stack Overflow! Please be sure to answer the question. class, PostRepository. *; import spring. The only restriction is that every class in the hierarchy must have the @SuperBuilder annotation. MapStruct takes the sting out of mapping entities to DTOs, and Java records make for elegant DTOs. 0. The body is provided by the subclass (inherited Jun 4, 2021 · At present MapStruct supports CDI (Contexts and Dependency Injection for JavaTM EE), JSR330 (Dependency Injection for Java) and the Spring Framework. May 17, 2020 · 4. A typical decorator implementation will be an abstract class and only implement/override a subset of the methods of the mapper type which it decorates. 2. getMapper( MyMapper. backoffice. This modal extends a base modal Nov 15, 2023 · AnimalDTO mainAnimal; } If now in Mapstruct i would write something like: @Mapper(config = MapperConfiguration. Run the application. artcurial. Example: public Result methodUnderTest() { Jun 9, 2020 · Simply initialize the Mapper private UserMapper userMapper = new UserMapperImpl() (and remove @Spy) When using the second approach you can even remove the @SpringBootTest because in the given snippet you do not need a Spring context (created by the annotation). AST modifications are not foreseen by Java annotation processing API, so quite some trickery was required within Lombok as well as Jul 3, 2023 · How To Use MapStruct With Java’s Records. Step 1: Setting up your Spring Boot project. May 8, 2015 · 6. graphql. 9. public abstract HeaderDTO toDTO(Aggregator aggregator); Jul 23, 2013 · To elaborate on @kevolution's answer: public void itemStateChanged(ItemEvent e) {. If you have something which is dynamic, based on some request parameters then you'll need to use @Context. Here is the code of the generated method : @Override. example: val Feb 21, 2020 · @MarcusVoltolim My point was that qualifiedBy or qualifiedByName are not needed in this specific example because there are no other properties that receives the source and returns the String (with the unlikely edge case that Source contains a property of type Source that maps to String). ", source = "header". This is the reference documentation of MapStruct, an annotation processor for generating type-safe, performant and dependency-free bean mapping code. We can define it as an abstract class that allows us to only implement those methods of the mapper interface which we want to customize. objects. Hope the above example helps in getting it compiling for you. return "DEFAULT-1" ; We want to test the method defaultImpl (), and we have two possible solutions – using a concrete class, or using Mockito. class}) public abstract class GameMapper {. Marks mapping methods with the given qualifier name. Following your code, the solution would be something like the following. @Mapping(target = ". Class DataDomainClass: public class DataDomainClass{ private List<DomainClass> data; } Class EntityClass: Mar 12, 2024 · java: The return type AbstractQuestionnaireDTO is an abstract class or interface. Mar 9, 2020 · Media is an abstract class which is implemented by a class Image and a class Video. See Mapstruct documentation:To allow mappings for abstract classes or interfaces you need to set the subclassExhaustiveStrategy to RUNTIME_EXCEPTION, you can do this at the @MapperConfig, @Mapper or @BeanMapping annotations. Method with @AfterMapping will be executed at the end of map method and it should have same input parameter as map method for example in below sample. nodes. The decorator must be a sub-type of the decorated mapper type. this. Overview. @Mapper ( componentModel = "spring", unmappedTargetPolicy = org. The generated mapping code uses plain method invocations and thus is fast, type-safe and easy to understand. Jun 17, 2022 · error: The return type List<DomainClass> is an abstract class or interface. public Set<DimensionItemTreeDTO> missionSetToTreeDtoSet(Set<Mission> set) {. class); DTOIntPerson personToDTOIntPerson(Person person); } When I build the programm there's no error, but the classes aren't being generated. class); will look for the generated implementation of the mapper interface. From what I understand you want to map your values into a singleton list. getMapper(DeviceDataMapper. @Mapper(. Final we have dependency injection via constructor. Add Lombok to the equation, and you end up with almost pure data classes and very little boilerplate code. Jan 18, 2024 · 2. kt @Mapper(componentModel = &quot;spring&quot;) abstract class BookMapper { @Autowired lateinit var Dec 1, 2017 · I made some research in the mapStruct documentation but did not find or understood what I could do to achieve this: the conversation of an entity containing an interface to a flat DTO object. 14. Item is an abstract class or interface. Documentation says: The generated mapper will inject all classes defined in the uses attribute. dto. To use this bean to retrieve weight info inside the mapper interface should be replaced with an Nov 13, 2021 · Now, I'd like to add a feature where the user can "override" this method, in the sense that they could for example add a statement to ignore the password of the account, while also calling the internal methods. I using MapStruct to map my entities, and I'm mocking my objects using Mockito. . public abstract class FarmMapper {. @RunWith(MockitoJUnitRunner. Apr 27, 2023 · In this comprehensive guide, we will explore the capabilities of MapStruct and how it can be used to maximize the efficiency and clarity of Java code. Few examples as reference points: import org. For some reason it seems to be missing in your deployment unit (WAR etc Jan 14, 2024 · Seems it's Lombok issue. I'm using MapStruct, mapstruct-jdk8 version 1. ) Were I in your position, I would create a small override implementation for testing: public @interface Named. Jun 8, 2022 · MapStruct allows to define a Decorator class and annotate it with @DecoratedWith annotation. 3. I am having an issue when I use mapstruct in an abstract class which extends an parent class. Final Java : 9 JUnit : 4. First, create a Spring Boot project using your preferred Jul 6, 2009 · 377. Will be used to select the correct mapping methods when mapping a bean property type, element of an iterable type or the key/value of a map type. There is no way around putting @SuperBuilder on all subclasses, because Lombok cannot know all subclasses at compile time. The following suggestion lets you test abstract classes without creating a "real" subclass - the Mock is the subclass and only a partial mock. rql. // Not intended to be generated, but to carry inheritable mapping annotations: @Mapping(target = "targetId", source = "id") ParentDto Mar 7, 2019 · 21. example 2: @BeanMapping (ignoreUnmappedSourceProperties = {"title"}) means ignore title field during the mapping process. simply @BeanMapping let you customize the mapping process. It is recommended to obtain mapper objects via Using an abstract class it worked well as demanded but using a @Context variable the default method gets not invoked. Here the entity with the attribute: public class Group { private IUser user; } Here the DTO: Marks an interface or abstract class as a mapper and activates the generation of a implementation of that type via MapStruct. Jan 16, 2024 · MapStruct. An abstract class is declared using the “abstract” keyword in its class definition. Aug 22, 2016 · I have two classes one is my actual PurchaseOrder class, which is known as my target class, and the other is EDPurchaseOrder class which is known as the source file, Don't worry about the naming conventions I used, go with source and target files. The normal Mapper doesn´t work: @Mapping(target = 'somethingToIgnore', ignore = 'true') Person toPerson(PersonDTO source); @InheritInverseConfiguration. IGNORE, uses = {MappingUtil. Basically, we have to create a simple interface or abstract class, and declare the mapping methods. @Mapper(unmappedTargetPolicy = ReportingPolicy. protected String currentOrderId; May 5, 2024 · MapStruct is a Java annotation processor that comes in handy when generating type-safe and effective mappers for Java bean classes. mapping method - type conversion. ADDER_PREFERRED, nullValueCheckStrategy Sep 2, 2023 · I have a Spring boot application where auto component scan is enabled and mapstruct seems to be set up correctly, since it works on basic mappings created on interfaces, but I can't seem to add a custom decorator to it. Jun 16, 2022 · architecture / Spring / Java. class); Error: (14, 14) java: The return type com. java generated by mapstruct. Aug 31, 2020 · public interface CurveMapper {. In Java 14, there were added record classes. IGNORE) @Primary. class) // nothing fancy in there. All you have to do is to define a mapper interface which declares any required mapping methods. At 6. List is an abstract class or interface. May 16, 2016 · However the generated collection mapping method does not use the decorated method to map each entity, is just uses the "vanilla" generated method on the delegate. public String getCode() {. Here is some sample code @Component @RequiredArgsConstructor public class Parent{ private final ServiceA serviceA; private final ServiceB serviceB; . Points to Remember. Mar 9, 2018 · 基本編。 環境 MapStruct : 1. MyMapper INSTANCE = Mappers. Aug 5, 2019 · 13. In general, mapping collections with MapStruct works the same way as for simple types. mapstruct. CONSTRUCTOR, uses = {IdentifierMapper. Feb 6, 2022 · How to using mapstruct and springboot bean together? @autowired. 18. How do you tell MapStruct to choose the concrete class based on the value of the discriminator field in the source class ? Method signature would typically be : Dec 2, 2014 · For example (one abstract class and two concrete classes): public abstract class Animal { private String name; } public class Cat extends Animal { private Boolean mouseCatcher; } public class Dog extends Animal { private Integer (Personally, I was previously in favor of real partial mocks of abstract classes as a "tool in the toolbox", but I'm coming around to thinking they're too far removed from reality to be useful. IGNORE, collectionMappingStrategy = CollectionMappingStrategy. Don't take my word for it. Asking for help, clarification, or responding to other answers. Oct 3, 2021 · 1. Have a look at GitHub repository to see how simple a Spring Boot May 26, 2022 · I have recently started using Mapstruct as part of my work and finding this really useful. In mapstruct 1. CALLS_REAL_METHODS), then mock any abstract methods that are invoked. Çağatay Sel. NO("no"); String code; TestEnum(String code) {. Can be used to qualify a single method or all methods of a given type by specifying this annotation on the type level. In this tutorial, we’ll specifically learn how to use the Mapstruct mappers with Java bean classes which are inherited. Inside target folder there will be PersonMapperImpl. MapStruct automatically creates intermediate methods for mapping between an array and a List. 5 (currently latest supported) and try to add this annotation processor config to your build Gradle file. util. I believe there's some problem with my pom, probably there’s something missing or misplaced in the build/plugin : Apr 27, 2023 · A mapper's method signature must provide the reference decorated with @Context annotation for a qualifiedByName method to use the context. The problem is the nested mapper is always null in my unit tests (works well in the application) this is my mapper declaration : @Mapper(componentModel = "spring", uses = MappingUtils. code = code. How to map objects as fields with mapstruct? 4. getMapper(CreatePersonMapper. example 1: @BeanMapping (ignoreByDefault = true) means No automatic mapping will take place, so All mappings have to be defined manually. I could use solution mentioned here mapstruct - Propagate parent field value to collection of nested objects - either directly after mapping to set some value to the child object or to use context. componentModel = "spring", injectionStrategy = InjectionStrategy. getMapper(DeviceTokensMapper. Feb 25, 2018 · 5. An abstract class must be declared with an abstract keyword. public @interface DecoratedWith. Dec 16, 2022 · uses clause in @Mapper annotation allow your mapper to use the mappers you defined if they are required. For, better understanding, I'm writing the normal java code example below. @Mapper(injectionStrategy = InjectionStrategy. See also #2257 and #2211 0. I want to test a method that contains a mapping with mapStruct. Nov 10, 2023 · Here’s an explanation of how to use MapStruct in a Spring Boot application with examples. You can also achieve providing the qualifiedByName method a reference to the enumDefinitionDao by auto-wiring the DAO in an abstract class via setter injection, as demonstrated below. To be more precisely, I even want something more elaborated: The target should be a class haven three properties in which the resulting target value must be split into. I added a mapping for Object so that I could just pass the Object that I get in the interceptor rather than casting it to one of the types that I have a mapping for, however, it doesn't work, it is not Jun 9, 2016 · Using MapStruct, I created a mapper that maps XmlSchedule to a SchedulePayload. Example 1: Creating mapper @Mapper public interface CarMapper { CarDto toCarDto(Car source); } Example 2: Use additional mappers with parameters uses(), componentModel() and injectionStrategy() Jan 8, 2024 · Let’s consider a case when we have an abstract class with a public non-abstract method: public abstract int abstractFunc() ; public String defaultImpl() {. I can prove it. Curve dtoCurve); } The build fails asking for concrete class/Object factory for Axis class. public abstract class DeviceDataMapper {. Step2 :- Go to Properties. And if you are using Gradle, first make sure you have version 8. If you have something which is a singleton, like a service you want to use, then maybe injecting it in your mapper is the Aug 31, 2017 · MapStruct: trouble with abstract class. return code; I have a code that I've got from service and I want to convert this code to Enum how to do it with easier way by mapstruct. Beta1 and Lombok 1. 0. Use Mockito. Sep 4, 2018 · I have mappings for all my different type of requests however since it is at the interceptor level I get a java Object for the request model. core. Aug 10, 2015 · MapStruct generates code at compile time, and the call to Mappers. PropertyNode; Feb 22, 2024 · More specifically in the @Mapper annotatation, the "uses" parameter includes the opposing mapper class. Final and defining abstract class that I inject via Spring. class); B AtoB(A entity); } Should generated: public class AMapperImpl implements AMapper {. Jul 6, 2018 · 60. //Getter and Setter. ReportingPolicy. It cannot be instantiated. Change the interface to an abstract mapper class, then you can implement specific mapping to the given property. class); com. A class which is declared as abstract is known as an abstract class. 1. Jun 23, 2020 · You need to set the subclassExhaustiveStrategy property in your @Mapper annotation to RUNTIME_EXCEPTION. mapstruct You can, however, use an abstract class instead which is fully compatible with MapStruct class generating including the Spring component model. 16. Feb 21, 2022 · @Mapper(componentModel = "spring", unmappedTargetPolicy = ReportingPolicy. @Autowired. 1)The MapStruct has good feature: @Mapper(componentModel = "spring", uses ={ObjectMapper. Consider to declare/implement a mapping method: "ArrayList map (ArrayList value)". Mapping Collections. @Mapping(target ="field", expression = "java(customMethod(obj))") Aug 21, 2022 · MapStruct allows you to map the entire target object to a particular source reference. 2. 1. getToExpression in class SimpleConversion Parameters: conversionContext - A context providing optional information required for creating the conversion. partNumber", ignore = true) public MyTarget mapSource2Target(final MySource mySource, final PartNumberMapConfiguration partNumberMapConfiguration); Mar 4, 2020 · historyMapper; Also for fields with same name in target and source no need to use @Mapping, so in above case below mapper definition is enough to acheive desired result. CurveMapper INSTANCE = Mappers. However, starting with Java 9, we can also add private methods in interfaces. MapStruct is a code generator that greatly simplifies the implementation of mappings between Java bean types based on a convention over configuration approach. class) 1. SourceClassModel sourceClassModel = new SourceClassModel(); MapStruct is a Java annotation processor for the generation of type-safe bean mapping classes. public abstract FarmMinimalDTO mapToFarmDTO(FarmDTO farmDTO); } If the farmDTO. Jan 16, 2014 · Yes, as of MapStruct 1. So i'm confused and really need some help. You need to change the interface to an abstract class and move PersonInfoSearchService call to @Named method: @Mapper (componentModel = "spring") public abstract class DemoConvert { @Autowired private PersonInfoSearchService personInfoSearchService; @Mapping (source = "name Jul 20, 2018 · 1. 3. Mar 9, 2021 · You need to have a MapperConfig that will carry all the common configurations. Based on our declarations, MapStruct will generate the mapping code automatically. class}, injectionStrategy = InjectionStrategy. Curve map(com. AMapperINSTANCE = Mappers. @AfterMapping is not much useful though you pass a Builder object, since we can't retrieve the processed values. Abstract method: can only be used in an abstract class, and it does not have a body. domain. // Write your method here. can be used to amend mappings performed by generated mapping methods. You can achieve that by providing 2 new methods in your mapper. Jan 30, 2018 · public abstract class AbstractItem { private String upc; private String quantity; //getter and setter for upc and quantity } public class OrderedItem extends AbstractItem { private String orderId; // getter and setter for orderId } Then I have a modal which I want to convert from OrderedItem. class, EventMapper. You can do subclass mapping by adding some after mapping methods like the following: @Mapper () public interface SuperClassMapper { SubClassMapper SUBCLASS_MAPPER_INSTANCE = Mappers. it finds 2 qualifying methods ( Program to String ). . And also you need to enable the Maven annotation processing by following steps in eclipse : Step1 :- Right click on the project. It can have abstract and non-abstract methods. An abstract class is one which is just like a regular class but can contain some 'stub' - or abstract - methods. Source Classes: Source class EDCustomerOrder and its reference classes: Feb 11, 2019 · Direct (types source -target are the same) Mapping method (built-in) Type conversion. Even though the mapping works fine, on unit test it complains about the component AddressConverter that cannot find Feb 8, 2022 · 5. getMappers(CurveMapper. Java and MapStruct. Maven Dependencies. data. In case this guide doesn’t answer all your questions just join the MapStruct GitHub Discussions to get help. int color; // An abstract function. class}) public interface HistoryMapper {. I am trying to build a REST Controller using Spring. CONSTRUCTOR) 2)You could do it this way: @Mapper(componentModel = "spring") @RequiredArgsConstructor //lombok annotation, which authowire your field via constructor. first make sure annotations processors already enabled in your IDE and lombok-mapstruct-binding dependency already present in you project. return delegate. It really depends what you need to do. Generic Wildcards with Map. Here's the main mapping method: @Mapping(target = "myTarget. Data. Jan 7, 2019 · Error:(53, 18) java: The return type java. nb rc xy tl ze ql ja fd fa ac