كيفية عمل رسم بياني بالجافا

لعمل رسوم بيانية بالجافا ، ينصح باستخدام هذه المكتبة JFreeChart

و هي أداة جميلة جدا تحتوي أغلب الرسوم البيانية

و هذه الرسوم البيانية التي تؤديها

pie charts (2D and 3D)

* bar charts (regular and stacked, with an optional 3D effect)

* line and area charts

* scatter plots and bubble charts

* time series, high/low/open/close charts and candle stick charts

* combination charts

* Pareto charts

* Gantt charts

* wind plots, meter charts and symbol charts

* wafer map charts

و هذه مواقع مختصة بهذا الموضوع

http://www.jfree.org/jfreechart/

http://www.javaworld.com/javaworld/jw-12-2...rceprofile.html

http://www.javaresources.biz/jfreechart_tutorial.jsp

و هذا مثال لعمل رسم بياني JFreeChart

		 

import java.awt.*;
import java.text.SimpleDateFormat;
import java.util.GregorianCalendar;
import javax.swing.JPanel;
import org.jfree.chart.*;
import org.jfree.chart.axis.DateAxis;
import org.jfree.chart.plot.XYPlot;
import org.jfree.chart.renderer.xy.XYLineAndShapeRenderer;
import org.jfree.chart.title.TextTitle;
import org.jfree.data.time.*;
import org.jfree.data.xy.XYDataset;
import org.jfree.ui.*;

public class YieldCurveDemo extends ApplicationFrame
{
	/* member class not found */
	class CustomDateAxis {}


	public YieldCurveDemo(String s)
	{
		super(s);
		JPanel jpanel = createDemoPanel();
		jpanel.setPreferredSize(new Dimension(500, 270));
		setContentPane(jpanel);
	}

	private static JFreeChart createChart(XYDataset xydataset)
	{
		JFreeChart jfreechart = ChartFactory.createTimeSeriesChart("US$ Treasury Yields", "Date", "Yield", xydataset, false, true, false);
		jfreechart.setBackgroundPaint(Color.white);
		XYPlot xyplot = (XYPlot)jfreechart.getPlot();
		GregorianCalendar gregoriancalendar = new GregorianCalendar(2005, 10, 15);
	   // xyplot.setDomainAxis(new CustomDateAxis("Date", gregoriancalendar.getTime()));
		xyplot.setBackgroundPaint(Color.lightGray);
		xyplot.setDomainGridlinePaint(Color.white);
		xyplot.setRangeGridlinePaint(Color.white);
		xyplot.setAxisOffset(new RectangleInsets(5D, 5D, 5D, 5D));
		xyplot.setDomainCrosshairVisible(true);
		xyplot.setRangeCrosshairVisible(true);
		org.jfree.chart.renderer.xy.XYItemRenderer xyitemrenderer = xyplot.getRenderer();
		if(xyitemrenderer instanceof XYLineAndShapeRenderer)
		{
			XYLineAndShapeRenderer xylineandshaperenderer = (XYLineAndShapeRenderer)xyitemrenderer;
			xylineandshaperenderer.setBaseShapesVisible(true);
			xylineandshaperenderer.setBaseShapesFilled(true);
		}
		DateAxis dateaxis = (DateAxis)xyplot.getDomainAxis();
		dateaxis.setDateFormatOverride(new SimpleDateFormat("MMM-yyyy"));
		jfreechart.addSubtitle(new TextTitle("November 2005"));
		TextTitle texttitle = new TextTitle("Source: http://www.econstats.com/r/r_am1.htm");
		texttitle.setFont(new Font("Dialog", 0, 9));
		texttitle.setPosition(RectangleEdge.BOTTOM);
		texttitle.setHorizontalAlignment(HorizontalAlignment.RIGHT);
		jfreechart.addSubtitle(texttitle);
		return jfreechart;
	}

	private static XYDataset createDataset()
	{
		TimeSeries timeseries = new TimeSeries("US$ Treasury Yields");
		Day day = new Day(1, 12, 2005);
		Day day1 = new Day(1, 2, 2006);
		Day day2 = new Day(1, 5, 2006);
		Day day3 = new Day(1, 12, 2006);
		Day day4 = new Day(1, 12, 2007);
		Day day5 = new Day(1, 12, 2008);
		Day day6 = new Day(1, 12, 2010);
		Day day7 = new Day(1, 12, 2012);
		Day day8 = new Day(1, 12, 2015);
		Day day9 = new Day(1, 12, 2025);
		timeseries.add(day, 3.79D);
		timeseries.add(day1, 3.9950000000000001D);
		timeseries.add(day2, 4.2599999999999998D);
		timeseries.add(day3, 4.3224999999999998D);
		timeseries.add(day4, 4.4474999999999998D);
		timeseries.add(day5, 4.4749999999999996D);
		timeseries.add(day6, 4.5199999999999996D);
		timeseries.add(day7, 4.5599999999999996D);
		timeseries.add(day8, 4.625D);
		timeseries.add(day9, 4.9050000000000002D);
		TimeSeriesCollection timeseriescollection = new TimeSeriesCollection();
		timeseriescollection.addSeries(timeseries);
		return timeseriescollection;
	}

	public static JPanel createDemoPanel()
	{
		JFreeChart jfreechart = createChart(createDataset());
		return new ChartPanel(jfreechart);
	}

	public static void main(String args[])
	{
		YieldCurveDemo yieldcurvedemo = new YieldCurveDemo("Yield Curve Demo");
		yieldcurvedemo.pack();
		RefineryUtilities.centerFrameOnScreen(yieldcurvedemo);
		yieldcurvedemo.setVisible(true);
	}
}

و انا مستعد للإفادة أي شخص بهذا الموضع