[FIXED] How I can resolve this problem (Class<SpringJUnit4ClassRunner> cannot be resolved to a type)?

Issue

I realized a simple projetc using spring and maven, my project contains an interface and 3 classes and the pom.xml file

Interface : CompactDisc.java

3 classes : SgtPeppers.java that implements the CompactDisc interface

CDPlayersConfig.java is an empty class and contains the annotations of automatic scan

CDPlayersTest.java is a test class to test if the spring container works.

My problem is with @RunWith(SpringJUnit4ClassRunner.class) and @ContextConfiguration(classes=CDPlayersConfig.class), Eclipse suggests this proposition for the first annotation Class cannot be resolved to a type and it doesn't understand the second annotation.

You find here the code :

CompactDisc.java

     package soundsystem; 
    public interface CompactDisc {
        void play();
}

SgtPeppers.java

package soundsystem;

import org.springframework.stereotype.Component;

@Component
public class SgtPeppers implements CompactDisc{

    private String title = "Sgt. Pepper's Lonely Hearts Club Band";
    private String artist = "The Beatles";

    public void play() {

        System.out.println("Playing " + title + "by"+ artist);
    }

}

CDPlayersConfig.java

package soundsystem;

import org.springframework.context.annotation.ComponentScan;
import org.springframework.context.annotation.Configuration;

@Configuration
@ComponentScan
public class CDPlayersConfig {

}

CDPlayerTest.java

package soundsystem;

import static org.junit.Assert.assertNotNull;

import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.transaction.jta.SpringJtaSynchronizationAdapter;

@RunWith(SpringJUnit4ClassRunner.class)//Here is my problem
@ContextConfiguration(classes=CDPlayersConfig.class)//Here is my problem
public class CDPlayerTest {

    @Autowired
    private CompactDisc cd;

    @Test
    public void cdShouldNotBeNull() {
        assertNotNull(cd);
    }
}

Dependencies im the pom file

<dependency>
            <groupId>junit</groupId>
            <artifactId>junit</artifactId>
            <version>${junit.version}</version>
            <scope>test</scope>
</dependency>

<dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-test</artifactId>
            <version>4.0.5.RELEASE</version>
            <scope>test</scope>
</dependency>

Solution

In Eclipse

Right Click on your Project

Select Maven

Select Update Project

Tick

Update project config from pom.xml

Refresh workspace

Clean projects

After doing that the required libraries should be available to Eclipse and you should be able to import the classes as required.

Answered By - mkane