JFreeChart实时折线图

JFreeChart实时折线图 利用Jfreechart实现applet的动态折线图 实时显示随机数

package com.cityinforport.demo;
import java.awt.BorderLayout;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;
import javax.swing.Jframe;
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;
   
public class RealTimeChart extends ChartPanel implements Runnable   
{   
    private static TimeSeries timeSeries;   
    private long value=0;   
       
    public RealTimeChart（String chartContentString titleString yaxisName）   
    {   
        super（createChart（chartContenttitleyaxisName））;   
    }   
       
    private static JFreeChart createChart（String chartContentString titleString yaxisName）{   
        //创建时序图对象   
        timeSeries = new TimeSeries（chartContentMillisecond.class）;   
        TimeSeriesCollection timeseriescollection = new TimeSeriesCollection（timeSeries）;   
        JFreeChart jfreechart = ChartFactory.createTimeSeriesChart（title“time（minutes）“yaxisNametimeseriescollectiontruetruefalse）;   
        XYPlot xyplot = jfreechart.getXYPlot（）;   
        //纵坐标设定   
        ValueAxis valueaxis = xyplot.getDomainAxis（）;   
        //自动设置数据轴数据范围   
        valueaxis.setAutoRange（true）;   
        //数据轴固定数据范围 30s   
        valueaxis.setFixedAutoRange（30000D）;   
   
        valueaxis = xyplot.getRangeAxis（）;   
        //valueaxis.setRange（0.0D200D）;   
   
        return jfreechart;   
      }   
   
    public void run（）   
    {   
        while（true）   
        {   
        try   
        {   
            timeSeries.add（new Millisecond（） randomNum（））;   
            Thread.sleep（300）;   
        }   
        catch （InterruptedException e）  {   }   
        }          
    }   
       
    private long randomNum（）   
    {      
//        System.out.println（（Math.random（）*20+80））;         
        return （long）（Math.random（）*20+80）;   
    }  
    
    public static void main（String[] args） {
  
       Jframe frame=new Jframe（“Test Chart“）;   
         RealTimeChart rtcp=new RealTimeChart（“Random Data““Random““value“）;   
         frame.getContentPane（）.add（rtcpnew BorderLayout（）.CENTER）;   
         frame.pack（）;   
         frame.setVisible（true）;   
         （new Thread（rtcp））.start（）;   
         frame.addWindowListener（new WindowAdapter（）    
         {   
             public void windowClosing（WindowEvent windowevent）   
             {   
                 System.exit（0）;   
             }   
        
         }）; 
 }
} 

 属性            大小     日期    时间   名称
----------- ---------  ---------- -----  ----
     文件         684  2011-05-28 06:19  jfree\bin\com\cityinforport\demo\RealTimeChart$1.class
     文件        3199  2011-05-28 06:19  jfree\bin\com\cityinforport\demo\RealTimeChart.class
     文件        2794  2011-05-28 06:19  jfree\src\com\cityinforport\demo\RealTimeChart.java
     文件         629  2011-05-28 06:14  jfree\.settings\org.eclipse.jdt.core.prefs
     文件         418  2011-05-28 06:15  jfree\.classpath
     文件         381  2011-05-28 06:14  jfree\.project
     目录           0  2011-05-28 11:01  jfree\bin\com\cityinforport\demo\
     目录           0  2011-05-28 11:01  jfree\src\com\cityinforport\demo\
     目录           0  2011-05-28 11:01  jfree\bin\com\cityinforport\
     目录           0  2011-05-28 11:01  jfree\src\com\cityinforport\
     目录           0  2011-05-28 11:01  jfree\bin\com\
     目录           0  2011-05-28 11:01  jfree\src\com\
     目录           0  2011-05-28 11:01  jfree\.settings\
     目录           0  2011-05-28 11:01  jfree\bin\
     目录           0  2011-05-28 11:01  jfree\src\
     目录           0  2011-05-28 11:01  jfree\