Apache POI runtime error while creating .xlsx file

Question

I have tried to write a simple code with Java FX to create an .xlsx file:

package apachepoi;

import java.net.URL;
import java.util.ResourceBundle;
import javafx.fxml.Initializable;
import java.io.*;
import org.apache.poi.xssf.usermodel.XSSFWorkbook;

public class ApachePOI_ViewController implements Initializable {
    private void CreateWorkBook() {
        try {
            XSSFWorkbook workbook = new XSSFWorkbook();
            FileOutputStream out = new FileOutputStream(new File("NewWorkBook.xlsx"));
            workbook.write(out);
            out.close();
            System.out.println("NewWorkBook.xlsx written successfully.");
        } catch (Exception ex) {
            System.out.println(ex);
        }
    }
    @Override
    public void initialize(URL url, ResourceBundle rb) {
            CreateWorkBook();
    }
}

But I got this error:

I have googled this error:

java.lang.ClassNotFoundException: org.apache.commons.collections4.ListValuedMap  

and got these two StackOverflow threads:

Apache POI error loading XSSFWorkbook class

ListValuedMap NoClassDefFoundError when Reading Excel using Apache Poi?

I have read these from character to character, but importing commons-collections4-4.1.jar file (actually I use 4.4 right now) didn't solve the Exception error.

My imported .jar files:

• poi-ooxml-4.1.2.jar
• commons-collections4-4.4.jar
• xmlbeans-3.1.0.jar
• dom4j-1.6.1.jar

What else should I do?