Btukfyl

How can I start a spring-boot project in place with maven that extends javafx.application.Application that contains no main method? Every time I try to start it with maven the error below gets shown.

Error message:

[ERROR] Failed to execute goal org.springframework.boot:spring-boot-maven-plugin:2.0.5.RELEASE:run (default-cli) on project chatClient: An exception occurred while running. The specified mainClass doesn't contain a main method with appropriate signature.: XX.XXX.ChatClient.main([Ljava.lang.String;) -> [Help 1]

pom.xml

<?xml version="1.0" encoding="UTF-8"?>

<project xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"

         xmlns="http://maven.apache.org/POM/4.0.0"

         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">

    <modelVersion>4.0.0</modelVersion>



    <groupId>XX.XXX</groupId>

    <artifactId>chatClient</artifactId>

    <version>1.1.4</version>

    <packaging>jar</packaging>



    <parent>

        <groupId>org.springframework.boot</groupId>

        <artifactId>spring-boot-starter-parent</artifactId>

        <version>2.0.5.RELEASE</version>

    </parent>



    <properties>

        <maven.compiler.source>1.8</maven.compiler.source>

        <maven.compiler.target>1.8</maven.compiler.target>

        <start-class>XX.XXX.ChatClient</start-class>

    </properties>



    <dependencies>

        <dependency>

            <groupId>org.springframework.boot</groupId>

            <artifactId>spring-boot-starter</artifactId>

        </dependency>

    </dependencies>



    <build>

        <plugins>

            <plugin>

                <groupId>org.springframework.boot</groupId>

                <artifactId>spring-boot-maven-plugin</artifactId>

                <configuration>

                    <mainClass>${start-class}</mainClass>

                </configuration>

                <executions>

                    <execution>

                        <goals>

                            <goal>repackage</goal>

                        </goals>

                    </execution>

                </executions>

            </plugin>

        </plugins>

    </build>

</project>

ChatClient.java

import javafx.application.Application;

import javafx.fxml.FXMLLoader;

import javafx.scene.Parent;

import javafx.scene.Scene;

import javafx.stage.Stage;

import org.springframework.boot.SpringApplication;

import org.springframework.boot.autoconfigure.SpringBootApplication;

import org.springframework.context.ConfigurableApplicationContext;

import java.io.IOException;



@SpringBootApplication

public class ChatClient extends Application {



    private ConfigurableApplicationContext springContext;

    private Parent root;



    @Override

    public void init() throws IOException {

        springContext = SpringApplication.run(ChatClient.class);



        FXMLLoader fxmlLoader = new FXMLLoader(getClass().getResource("/view/root.fxml"));

        fxmlLoader.setControllerFactory(springContext::getBean);

        root = fxmlLoader.load();

    }



    @Override

    public void start(Stage primaryStage) {

        primaryStage.setScene(new Scene(root));

        primaryStage.setTitle("Chat client");

        primaryStage.centerOnScreen();

        primaryStage.show();

    }



    @Override

    public void stop() {

        springContext.stop();

    }

}

root.fxml

<?xml version="1.0" encoding="UTF-8"?>



<?import javafx.scene.layout.BorderPane?>

<BorderPane></BorderPane>

Replace:

 <plugin>

                <groupId>org.springframework.boot</groupId>

                <artifactId>spring-boot-maven-plugin</artifactId>

                <configuration>

                    <mainClass>${start-class}</mainClass>

                </configuration>

                <executions>

                    <execution>

                        <goals>

                            <goal>repackage</goal>

                        </goals>

                    </execution>

                </executions>

            </plugin>

with:

 <plugin>

                <groupId>org.springframework.boot</groupId>

                <artifactId>spring-boot-maven-plugin</artifactId>

            </plugin>

There is no need to specify mainClass.

Here you have a full example.

UPDATE

Now I notice you do not have a main method. Add this code to ChatClient class:

public static void main(String args) {

        Application.launch(ChatClient.class, args);

}