DynamicTimeSeriesCollection和串行通信

时间:2014-04-30 18:18:45

标签: java dynamic serial-port time-series jfreechart

我正在使用DynamicTimeSeriesCollection来绘制从串口到我的图表的测量结果。 我想使用我在另一篇文章中找到的代码。

我希望实现这样的目标: Using JFreeChart to display recent changes in a time series

我发现的其他帖子中的代码:

How to combine Java plot code and Java serial code to read Arduino sensor value?

1. Move dataset and newData up to become instance variables:

DynamicTimeSeriesCollection dataset;
float[] newData = new float[1];

2. Add a method that appends your data to the chart's dataset:

public synchronized void addData(byte[] chunk) {
    for (int i = 0; i < chunk.length; i++) {
        newData[0] = chunk[i];
        dataset.advanceTime();
        dataset.appendData(newData);
    }
}

3. Invoke the method from serialEvent():

demo.addChunk(chunk);

这是SerialCommunication类中的串行事件方法:

public void serialEvent(SerialPortEvent oEvent) {
    if (oEvent.getEventType() == SerialPortEvent.DATA_AVAILABLE) {
        try
        {
            Date d = new Date();
            SimpleDateFormat dt = new SimpleDateFormat("yyyy-MM-dd hh:mm:ss");
            String datetime = dt.format(d);
            String inputLine = input.readLine();

            String[] measurements = inputLine.split(",");
            double humidity = Double.parseDouble(measurements[0]);
            double temp = Double.parseDouble(measurements[1]);
            double ldr = Double.parseDouble(measurements[2]);
            humidityList.add(humidity);
            tempList.add(temp);
            ldrList.add(ldr);

            System.out.println(datetime+" > "+inputLine);
        }
        catch (Exception e) {
            System.err.println(e.toString());
        }
    }
}

串行通信类中的ArrayList:

private ArrayList<Double> humidityList = new ArrayList<Double>();
private ArrayList<Double> tempList = new ArrayList<Double>();
private ArrayList<Double> ldrList = new ArrayList<Double>();

以下是我在GUI类中声明ArrayList的方法:

private static ArrayList<Double> m1;
private static ArrayList<Double> m2;
private static ArrayList<Double> m3;


public GUI(final String title,ArrayList<Double> humidity,ArrayList<Double> temp,ArrayList<Double> ldr) 
{

super(title);
m1 = humidity;
m2 = temp;
m3 = ldr;

我确实尝试修改我用测量结果找到的代码,但没有运气。任何想法我怎么能实现这个目标?

1 个答案:

答案 0 :(得分:1)

SwingWorker是解决此问题的最佳方法。

  • 创建一个包含三个Measurement属性的课程Double

  • 扩展SwingWorker<Measurement, Measurement>

  • doInBackground()的实施过程中publish()每个Measurement到达时。

  • process()的实施中,按照建议herehere更新图表的数据集。