libsvm中java.lang.NoSuchFieldException: rand

今天碰到了这个问题，网上搜了好久，才找到原因是版本问题

我weka用的是3.6，后来把libsvm也改成了3.2的就可以了

在eclipse里引用的weka的api，所以把libsvm.jar,weka.jar都加进工程了

	public void test(){
		File inputfile = new File("test/train_message.arff");
        ArffLoader loader = new ArffLoader();
        try {
			loader.setFile(inputfile);
			Instances insTrain = loader.getDataSet();
	        insTrain.setClassIndex(insTrain.numAttributes()-1);
//	        Classifier classifier = new WLSVM();
	        
	        Classifier classifier = (Classifier) Class.forName(
	                  "weka.classifiers.functions.LibSVM").newInstance();
	        String[] optSVM = weka.core.Utils.splitOptions("-c 8.0 -g 8.0");
	        classifier.setOptions(optSVM);
	        classifier.buildClassifier(insTrain);
//	        Instance current = null;
//	        while ((current = loader.getNextInstance(insTrain)) != null) {
//	            classifier.distributionForInstance(current);
//	        }
	        inputfile = new File("test/test_message.arff");
	        loader.setFile(inputfile);
	        Instances insTest = loader.getDataSet();
	        insTest.setClassIndex(insTest.numAttributes()-1);
	        Evaluation eval = new Evaluation(insTest);
	        eval.crossValidateModel(classifier, insTest, 10, new Random(1));
	        System.out.println(eval.errorRate());
	        System.out.println(classifier.toString());
		} catch (Exception e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}