Jfreechart问题 走势图 在线等 ~

[lixiaoxue85]

现在需要的效果是象TimeSeriesDemo5 ,就是2个个走势图,一个是历史图,另一个是根据时间变化的.用来和历史图对比的走势图.这个Demo的源代码要花钱买,太恶心了.谁有相关资料提供下吗?还有着么实现这个随时间变化而改变的.(本程序在本地运行就行)

[amozon]

/* --------------------
* MemoryUsageDemo.java
* --------------------
* (C) Copyright 2002-2004, by Object Refinery Limited.
*/
package org.jfree;

import java.awt.BasicStroke;
import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.Font;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;

import javax.swing.BorderFactory;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.Timer;

import org.jfree.chart.ChartPanel;
import org.jfree.chart.JFreeChart;
import org.jfree.chart.axis.DateAxis;
import org.jfree.chart.axis.NumberAxis;
import org.jfree.chart.plot.XYPlot;
import org.jfree.chart.renderer.xy.DefaultXYItemRenderer;
import org.jfree.chart.renderer.xy.XYItemRenderer;
import org.jfree.chart.title.LegendTitle;
import org.jfree.data.time.Millisecond;
import org.jfree.data.time.TimeSeries;
import org.jfree.data.time.TimeSeriesCollection;
import org.jfree.ui.RectangleInsets;
import org.jfree.ui.Spacer;

/**
* A demo application showing a dynamically updated chart that displays the
* current JVM memory usage.
*/
public class MemoryUsageDemo extends JPanel
{
/** Time series for total memory used. */
private TimeSeries total;

/** Time series for free memory. */
private TimeSeries free;

/**
* Creates a new application.
*
* @param historyCount
* the history count (in milliseconds).
*/
public MemoryUsageDemo(int historyCount)
{
super(new BorderLayout());
// create two series that automatically discard data more than 30
// seconds old...
this.total = new TimeSeries("Total Memory", Millisecond.class);
this.total.setHistoryCount(historyCount);
this.free = new TimeSeries("Free Memory", Millisecond.class);
this.free.setHistoryCount(historyCount);
TimeSeriesCollection dataset = new TimeSeriesCollection();
dataset.addSeries(this.total);
dataset.addSeries(this.free);
DateAxis domain = new DateAxis("Time");
NumberAxis range = new NumberAxis("Memory");
domain.setTickLabelFont(new Font("SansSerif", Font.PLAIN, 12));
range.setTickLabelFont(new Font("SansSerif", Font.PLAIN, 12));
domain.setLabelFont(new Font("SansSerif", Font.PLAIN, 14));
range.setLabelFont(new Font("SansSerif", Font.PLAIN, 14));
XYItemRenderer renderer = new DefaultXYItemRenderer();
renderer.setSeriesPaint(0, Color.red);
renderer.setSeriesPaint(1, Color.green);
renderer.setStroke(new BasicStroke(3f, BasicStroke.CAP_BUTT, BasicStroke.JOIN_BEVEL));
XYPlot plot = new XYPlot(dataset, domain, range, renderer);
plot.setBackgroundPaint(Color.lightGray);
plot.setDomainGridlinePaint(Color.white);
plot.setRangeGridlinePaint(Color.white);
plot.setAxisOffset(new RectangleInsets(5.0, 5.0, 5.0, 5.0));
domain.setAutoRange(true);
domain.setLowerMargin(0.0);
domain.setUpperMargin(0.0);
domain.setTickLabelsVisible(true);
range.setStandardTickUnits(NumberAxis.createIntegerTickUnits());
JFreeChart chart = new JFreeChart("JVM Memory Usage", new Font("SansSerif", Font.BOLD, 24), plot,
true);
chart.setBackgroundPaint(Color.white);
ChartPanel chartPanel = new ChartPanel(chart);
chartPanel.setBorder(BorderFactory.createCompoundBorder(BorderFactory.createEmptyBorder(4, 4, 4, 4),
BorderFactory.createLineBorder(Color.black)));
LegendTitle legend = (LegendTitle) chart.getLegend();
legend.setItemFont(new Font("SansSerif", Font.PLAIN, 12));
add(chartPanel);
}

/**
* Adds an observation to the ’total memory’ time series.
*
* @param y
* the total memory used.
*/
private void addTotalObservation(double y)
{
this.total.add(new Millisecond(), y);
}

/**
* Adds an observation to the ’free memory’ time series.
*
* @param y
* the free memory.
*/
private void addFreeObservation(double y)
{
this.free.add(new Millisecond(), y);
}

/**
* The data generator.
*/
class DataGenerator extends Timer implements ActionListener
{
/**
* Constructor.
*
* @param interval
* the interval (in milliseconds)
*/
DataGenerator(int interval)
{
super(interval, null);
addActionListener(this);
}

/**
* Adds a new free/total memory reading to the dataset.
*
* @param event
* the action event.
*/
public void actionPerformed(ActionEvent event)
{
long f = Runtime.getRuntime().freeMemory();
long t = Runtime.getRuntime().totalMemory();
addTotalObservation(t);
addFreeObservation(f);
}
}

/**
* Entry point for the sample application.
*
* @param args
* ignored.
*/
public static void main(String[] args)
{
JFrame frame = new JFrame("Memory Usage Demo");
MemoryUsageDemo panel = new MemoryUsageDemo(30000);
frame.getContentPane().add(panel, BorderLayout.CENTER);
frame.setBounds(200, 120, 600, 280);
frame.setVisible(true);
panel.new DataGenerator(1000).start();
frame.addWindowListener(new WindowAdapter()
{
public void windowClosing(WindowEvent e)
{
System.exit(0);
}
});
}
}

[lixiaoxue85]

好的 谢谢大佬~~这个是监控JVM的DEMO吧~~哎~我咋没想到呢~~我先看下

[lixiaoxue85]

import org.jfree.ui.Spacer;这个包找不到哦~~这个DEMO是在哪里找到哦？
这句 this.total.setHistoryCount(historyCount);的方法也不认
请教下~~

[amozon]

jfreechart的包里面有的,注意用最新版本
这个DEMO是在收费的那个文档里的,有破解的,省了29$,^-^