用jfreechart实现的动态曲线

用jfreechart实现动态曲线，有系统产生随机数，然后画出曲线，并能实时显示曲线

//实时曲线——时序图
import org.jfree.chart.ChartFactory;
import org.jfree.chart.ChartPanel;
import org.jfree.chart.JFreeChart;
import org.jfree.chart.axis.ValueAxis;
import org.jfree.chart.plot.XYPlot;
import org.jfree.data.time.Millisecond;
import org.jfree.data.time.TimeSeries;
import org.jfree.data.time.TimeSeriesCollection;
import java.awt.*;
import javax.swing.*;
import java.awt.event.*;

public class RealTimeChart extends ChartPanel implements RunnableActionListener
{
    private static final long serialVersionUID = 1L;
    static JLabel show;//显示随机数
    private static TimeSeries timeSeries;
    public RealTimeChart（String chartContentString titleString yaxisName）
    {   //构造函数，第一个参数为图表内容，第二个参数为图表标题第三个参数为纵坐标标题
        super（createChart（chartContenttitleyaxisName））;

 属性            大小     日期    时间   名称
----------- ---------  ---------- -----  ----
     目录           0  2019-07-19 14:16  .idea\
     文件         630  2019-07-19 14:05  .idea\compiler.xml
     目录           0  2019-07-19 14:17  .idea\inspectionProfiles\
     目录           0  2019-07-19 14:05  .idea\libraries\
     文件         691  2019-07-19 14:05  .idea\libraries\Maven__org_jfree_chart_com_springsource_org_jfree_chart_1_0_9.xml
     文件         632  2019-07-19 14:05  .idea\libraries\Maven__org_jfree_com_springsource_org_jfree_1_0_12.xml
     文件         465  2019-07-19 14:06  .idea\misc.xml
     文件         278  2019-07-19 14:02  .idea\modules.xml
     文件       24923  2019-07-19 14:16  .idea\workspace.xml
     目录           0  2019-07-19 14:05  chartdemo\
     文件        1080  2019-07-19 14:05  chartdemo\chartdemo.iml
     文件         776  2019-07-19 14:05  chartdemo\pom.xml
     目录           0  2019-07-19 14:04  chartdemo\src\
     目录           0  2019-07-19 14:04  chartdemo\src\main\
     目录           0  2019-07-19 14:04  chartdemo\src\main\java\
     文件        3175  2019-07-19 14:02  chartdemo\src\main\java\RealTimeChart.java
     目录           0  2019-07-19 14:17  chartdemo\src\main\resources\
     目录           0  2019-07-19 14:04  chartdemo\src\test\
     目录           0  2019-07-19 14:17  chartdemo\src\test\java\
     目录           0  2019-07-19 14:05  chartdemo\target\
     目录           0  2019-07-19 14:05  chartdemo\target\classes\
     文件         611  2019-07-19 14:05  chartdemo\target\classes\RealTimeChart$1.class
     文件        3559  2019-07-19 14:05  chartdemo\target\classes\RealTimeChart.class
     目录           0  2019-07-19 14:05  chartdemo\target\generated-sources\
     目录           0  2019-07-19 14:17  chartdemo\target\generated-sources\annotations\