这是加载模型以预测实例值的示例。示例模型是在Weka Explorer中创建并保存的J48决策树。它是根据Weka提供的名义天气数据构建的。它称为“
tree.model”。

 //load model
String rootPath="/some/where/"; 
Classifier cls = (Classifier) weka.core.SerializationHelper.read(rootPath+"tree.model");

//predict instance class values
Instances originalTrain= //load or create Instances to predict

//which instance to predict class value
int s1=0;

//perform your prediction
double value=cls.classifyInstance(originalTrain.instance(s1));

//get the name of the class value
String prediction=originalTrain.classAttribute().value((int)value);

System.out.println("The predicted value of instance "+
                    Integer.toString(s1)+
                    ": "+prediction);

输出是：

The predicted value of instance 0: no

Weka api和序列化的入门者资源非常丰富！