libsvm中java.lang.NoSuchFieldException: rand

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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 blocke.printStackTrace();}

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