Method undefined for type Java

问题

Having real trouble figuring out where i'm going wrong on this one. Building a system using WEKA in java to study associations and am trying to implement the Apriori algorithm. Currently this is the code:

package model;

import weka.associations.*;
import weka.core.Instances;
import weka.core.converters.ConverterUtils.DataSource;

public class Apriori {

public static void main(String args[]) throws Exception {
    String dataset = "/Users/andrew/workspace/Movies/src/data/tagsfinal.arff";
    DataSource dsource = new DataSource(dataset);
    Instances dapriori = dsource.getDataSet();


    Apriori apriori = new Apriori();
     apriori.buildAssociations(dapriori);

    System.out.println(apriori);
  }
}

From looking at several implementations across the web this seems to be a widely accepted method of doing this however i receive an error on the "apriori.buildAssociations" line telling me that the method is undefined for the type Apriori. Furthermore, the import statement i use for the associations only works as the package type and when trying to extend it to :

import weka.associations.Apriori;

this throws an error message that "The import weka.associations.Apriori conflicts with a type defined in the same file". I have scoured StackOverflow alongside other resources and realize there is a lot of type undefined questions out there however have yet to find a solution to this problem. Any help/pointers would be greatly appreciated.

回答1:

Your class is also named Apriori, so you are experiencing a name clash.

You should change the name of your own class to a different name (e.g. AprioriTest). In the unprobable case where you would really need your class to be named Apriori, then you would have to refer to the library's implementation by it's full name:

weka.associations.Apriori apriori = new weka.associations.Apriori();
apriori.buildAssociations(dapriori);

来源：https://stackoverflow.com/questions/35610155/method-undefined-for-type-java