public KNN(Data data) {
this.data = data;
result = new int[data.getTestNum()][2];
data.minMaxDataFormat(data.getTrainData());
data.minMaxDataFormat(data.getTestData());
}
/** 设置优先级队列的比较函数，距离越大，优先级越高 */
public KNN() {
data = new Data();
result = new int[data.getTestNum()][2];
data.minMaxDataFormat(data.getTrainData());
data.minMaxDataFormat(data.getTestData());
}