Java Weka求值参数0/1

我可以知道需要插入（）的参数是什么吗？0还是1？我的数据集有三个类

System.out.println("False Negative % = " + eval.falseNegativeRate(1));
System.out.println("True Negative % = " + eval.trueNegativeRate(1));
System.out.println("True Positive % = " + eval.truePositiveRate(1));
System.out.println("Accuracy % = " + accuracy);
System.out.println("Precision % = " + eval.precision(1));
System.out.println("Recall % = " + eval.recall(1));
System.out.println("F-Measure % = " + eval.fMeasure(1));
System.out.println("Error rate % = " + eval.errorRate());