Simple class utilizing the KNN implementation

KNN Test Class

import java.util.Random;

import org.deeplearning4j.datasets.iterator.DataSetIterator;
import org.deeplearning4j.datasets.iterator.impl.IrisDataSetIterator;
import org.nd4j.linalg.api.ndarray.INDArray;
import org.nd4j.linalg.api.ops.impl.accum.distances.EuclideanDistance;
import org.nd4j.linalg.dataset.DataSet;
import org.nd4j.linalg.dataset.SplitTestAndTrain;
import org.nd4j.linalg.factory.Nd4j;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;


/**
 * KNN Test Class
 *
 */
public class App 
{
	private static Logger log = LoggerFactory.getLogger(App.class);
    public static void main( String[] args )
    {
    	knnTest();
    	
    }
    
    
    private static void knnTest() {
    	DataSetIterator iter = new IrisDataSetIterator(150, 150);
    	DataSet dataset = iter.next();
    	
    	
    	SplitTestAndTrain trainTest = dataset.splitTestAndTrain(120, new Random(3));
    	INDArray features = trainTest.getTest().getFeatureMatrix();
    	KNN knn = new KNN(7);
    	knn.fit(trainTest.getTrain());
    	System.out.println("P,C");
    	int[] prediction = knn.predict(features);
    	for (int i=0; i < features.rows(); i++) {
    		
    		System.out.println(prediction[i] + "," + Nd4j.getBlasWrapper().iamax(trainTest.getTest().getLabels().getRow(i)));
    	}
    }
    	
}

Hi I am getting an error saying No Backend Found.

Caused by: java.lang.RuntimeException: org.nd4j.linalg.factory.Nd4jBackend$NoAvailableBackendException: Please ensure that you have an nd4j backend on your classpath. Please see: http://nd4j.org/getstarted.html
at org.nd4j.linalg.factory.Nd4j.initContext(Nd4j.java:5354)
at org.nd4j.linalg.factory.Nd4j.(Nd4j.java:186)
... 5 more
Caused by: org.nd4j.linalg.factory.Nd4jBackend$NoAvailableBackendException: Please ensure that you have an nd4j backend on your classpath. Please see: http://nd4j.org/getstarted.html
at org.nd4j.linalg.factory.Nd4jBackend.load(Nd4jBackend.java:178)
at org.nd4j.linalg.factory.Nd4j.initContext(Nd4j.java:5351)

Did anyone found a fix for the issue @parvathysasi had? I've implemented the KNN exactly as in the tutorial but get the same error.