如何使用java获取weka中最近的邻居

import weka.core.*;
import weka.core.neighboursearch.LinearNNSearch;

public class NearestNeighbour {
    public static void main(String[] args) throws Exception {
        // 创建一些实例
        Instances instances = new Instances(new BufferedReader(new FileReader("yourfile.arff")));

        // 创建一个新的线性搜索对象
        LinearNNSearch knn = new LinearNNSearch(instances);

        // 创建一个需要找到其最近邻居的实例
        Instance instance = new DenseInstance(3);
        instance.setValue(0, 1.0);
        instance.setValue(1, 2.0);
        instance.setValue(2, 3.0);

        // 找到最近的k个邻居
        int k = 3;
        Instances nearestInstances = knn.kNearestNeighbours(instance, k);

        // 输出最近的k个邻居
        for (int i = 0; i < nearestInstances.numInstances(); i++) {
            System.out.println(nearestInstances.instance(i));
        }
    }
}