显示整数数组的java不起作用

Question

我有一段代码，用于通过检测QRS峰值从ECG信号计算心率：

public class Heart_Rate {

public static void main(String[] args) throws IOException{
    // Read Text file
    Path filePath = Paths.get("heartrate.txt");
    Scanner scanner = new Scanner(filePath);
    List<Double> rawData = new ArrayList<Double>();

    while (scanner.hasNext()) {
        if (scanner.hasNextDouble()) {
            rawData.add(scanner.nextDouble());
        } else {
            scanner.next();
        }
    }
    System.out.println(rawData);

    //Find Max value for Threshold Level
    Double maximum = Collections.max(rawData);
    Double threshold = 0.7*maximum;

    System.out.println("Maximum = " + maximum);
    System.out.println("Threshold = " + threshold);

    //Calculate Heart Rate from list "Raw Data"
    int upflag = 0;
    int last = 1;
    int p = 0;
    int t = 0;
    int count = 0;
    //List<Double> heartRate = new ArrayList<Double>();
    int heartRate2[] = new int[50];

    for (int i = 0; i < rawData.size(); i++) {
        if (rawData.get(i)> threshold){
            if (upflag == 0){
                if (last > 0){
                    t = i - last;
                    p = 100*60/t;
                    //100 is the sampling rate
                    heartRate2[count] = p;
                    count = count + 1;
                    //heartRate.add(p);

                }
                last = i;
            }
            upflag = 50;
        }
        else {
            if (upflag > 0){
                upflag = upflag -1;
            }
        }
    }
    System.out.println("Count = " + count);
    System.out.println("Heart Rate = " + heartRate2);
    System.out.println("Heart Rate = " + heartRate2);

    }


}

当我将计算的心率值（p）添加到ArrayList（称为心率）时，我收到了一个正确的值数组。 但是，我尝试将所有值更改为int，并将值保存在整数数组（称为heartRate2）中，结果如下： 心率=[I@dd1e765 我需要我的值是整数，因为心率是以每分钟的心跳数计算的。我还尝试将双精度值转换为int，但最终得到了与上面类似的结果

Answer 1

使用Arrays.toString(arr)为某些数组arr获取有意义的String表示