java - 如何在 JFreechart 图表上绘制多个图表

Question

我正在开发一个arduino项目，我应该使用串行读取来绘制图表。我正在使用 JFreechart。在我的代码中，我只能绘制一张图。但我需要在同一张图上绘制 4 个或多个图。

我得到一些由“，”分隔的数值。以下是代码。请帮我绘制 4 个或多个图表。我可以绘制一个，但不能绘制多个。

import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.util.Scanner;

import javax.swing.JButton;
import javax.swing.JComboBox;
import javax.swing.JFrame;
import javax.swing.JPanel;

import org.jfree.chart.ChartFactory;
import org.jfree.chart.ChartPanel;
import org.jfree.chart.JFreeChart;
import org.jfree.chart.axis.NumberAxis;
import org.jfree.chart.plot.PlotOrientation;
import org.jfree.chart.plot.XYPlot;
import org.jfree.data.xy.XYSeries;
import org.jfree.data.xy.XYSeriesCollection;

import com.fazecast.jSerialComm.SerialPort;

public class SerialDataRead {

static SerialPort chosenPort;

public static void main(String[] args) {
    // TODO Auto-generated method stub
    final JFrame window = new JFrame();
    window.setTitle("Sensor graph GUI");
    window.setSize(1200,800);
    window.setLayout(new BorderLayout());
    window.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

    JPanel basePanel = new JPanel();
    basePanel.setSize(900, 700);

    final JComboBox portList = new JComboBox();
    final JButton connectButton = new JButton("Connect");
    JPanel topPanel = new JPanel();
    window.add(topPanel, BorderLayout.NORTH);
    topPanel.add(portList);
    topPanel.add(connectButton);


    SerialPort[] portNames = SerialPort.getCommPorts();
    for(int i =0; i < portNames.length; i++)
        portList.addItem(portNames[i].getSystemPortName());



    final XYSeries series = new XYSeries("Serial port data reading");
    final XYSeries series2 = new XYSeries("Serial port data reading");
    XYSeriesCollection dataset = new XYSeriesCollection(series);
    JFreeChart chart = ChartFactory.createXYLineChart("Serial port reading", "Time (seconds)", "adc reading", dataset);
    XYPlot plot = (XYPlot) chart.getPlot();
    plot.setBackgroundPaint(Color.WHITE);
    NumberAxis domain = (NumberAxis) plot.getDomainAxis();
    NumberAxis rangeAxis   = (NumberAxis) plot.getRangeAxis();
    //domain.setRange(0.00, 40.00);
     rangeAxis.setRange(0.0, 505.0);
    window.add(new ChartPanel(chart), BorderLayout.CENTER);


    connectButton.addActionListener(new ActionListener(){

         public void actionPerformed(ActionEvent arg0){
            if(connectButton.getText().equals("Connect")){

                chosenPort =  SerialPort.getCommPort(portList.getSelectedItem().toString());
                chosenPort.setComPortTimeouts(SerialPort.TIMEOUT_SCANNER, 0, 0);
                if(chosenPort.openPort()){
                    connectButton.setText("Disconnect");
                    portList.setEnabled(false);

                }

                Thread thread = new Thread(){
                    @Override public void run(){
                        Scanner scanner = new Scanner(chosenPort.getInputStream());
                    int x =0;
                        while(scanner.hasNextLine()){

                            String line = scanner.nextLine();
                            String[] values = line.split(",");
                            int number = Integer.parseInt(values[0]);
                            int number2 = Integer.parseInt(values[1]);
                            series.add(x++, number);
                            //series2.add(x++, number2);
                               XYSeriesCollection my_data_series= new XYSeriesCollection();
                                // add series using addSeries method
                                my_data_series.addSeries(series);
                              //  my_data_series.addSeries(series2);
                               // JFreeChart XYLineChart=ChartFactory.createXYLineChart("Team - Number of Wins","Year","Win Count",my_data_series,PlotOrientation.VERTICAL,true,true,false);
                            //window.repaint();
                            System.out.println(Integer.parseInt(values[1]));
                        }
                        scanner.close();
                    }
                };

                thread.start();


            }else{

                chosenPort.closePort();
                portList.setEnabled(true);
                connectButton.setText("Connect");
            }

        }
    });

    window.setVisible(true);
}

}

Answer 1

您的程序未正确同步，因为它从 event dispatch thread 以外的线程更新 Swing GUI 组件。 。使用SwingWorker ，如图here ，收集 doInBackground() 实现中的数据、publish() 临时结果，并更新 process() 实现中的每个系列，它将在事件调度线程上调用。您可以将 add() 值添加到构成 XYSeriesCollection 的各个 XYSeries 中，如图 here 所示。 .