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

Question

Trying to create a class that writes to an Excel file.

Error( https://gyazo.com/8d8977786add756057bb1d32866942df ): java.lang.ClassNotFoundException: org.apache.commons.collections4.ListValuedMap

Libaries I have added ( https://gyazo.com/cfa1555bd58de436bc243f1067b9e08b ): poi-3.16.jar, poi-ooxml-3.16.jar, poi-ooxml-schemas-3.16.jar, commons-collections4-4.0.jar, xmlbeans-2.3.0.jar

public void Create(){
    XSSFWorkbook workbook = new XSSFWorkbook();
    XSSFSheet sheet = workbook.createSheet(("Results"));



    try {
        FileOutputStream stream= new FileOutputStream(filelocation);
        workbook.write(stream);
        workbook.close();
    } 
    catch (FileNotFoundException e) {
        e.printStackTrace();
    } 
    catch (IOException e) {
        e.printStackTrace();
    }
}

}

Answer 1

You need a more recent version of commons-collections4. If you look at the Javadocs for ListValuedMap , you'll see that it was introduced in version 4.1, and you have 4.0 on your classpath.

You should consider using Maven or another dependency management tool as it will save you a lot of headaches.