Graf i Java med NetBeans.

Jeg plejer at bruge JFreeChart til at lave grafer med i Java

Skal man købe Developers... for at få information omkring hvorledes man benytter JFreeChart?

Jeg har altid kunnet regne det ud udfra klasse/metode navne og diverse
samples.

Hæhæ, ok. Det kigger jeg på :-)
Laver du ikke et svar?

kommer her

jeg har iøvrigt nogle eksempler liggende

Dem vil jeg meget gerne se. Kan du uploade dem et sted?

jeg kan poste lidt kode her

import java.awt.image.*;
import java.io.*;
import java.util.*;

import javax.imageio.*;
import javax.servlet.*;
import javax.servlet.http.*;

import org.jfree.chart.*;
import org.jfree.chart.axis.*;
import org.jfree.chart.plot.*;
import org.jfree.chart.renderer.xy.*;
import org.jfree.data.xy.*;

public class CurveServlet extends HttpServlet {
    public void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        response.setContentType("image/jpeg");
        String title = request.getParameter("title");
        String data = request.getParameter("data");
        StringTokenizer st = new StringTokenizer(request.getParameter("values"), ",");
        double[] val = new double[st.countTokens()];
        int ix = 0;
        while (st.hasMoreTokens()) {
            val[ix] = Double.parseDouble(st.nextToken());
            ix++;
        }
        XYSeries ser = new XYSeries(data);
        for (int i = 0; i < val.length; i++) {
            ser.add(i + 1, val[i]);
        }
        XYSeriesCollection dataset = new XYSeriesCollection();
        dataset.addSeries(ser);
        JFreeChart chart = ChartFactory.createXYLineChart(title, "X", "Y", dataset, PlotOrientation.VERTICAL, true, true, false);
        XYPlot plot = chart.getXYPlot();
        XYItemRenderer renderer = plot.getRenderer();
        if (renderer instanceof StandardXYItemRenderer) {
            StandardXYItemRenderer rr = (StandardXYItemRenderer) renderer;
            rr.setPlotShapes(true);
            rr.setShapesFilled(true);
        }
        NumberAxis axis = (NumberAxis) plot.getDomainAxis();
        axis.setTickUnit(new NumberTickUnit(1.0));
        BufferedImage bi = chart.createBufferedImage(200, 200);
        ImageIO.write(bi, "JPEG", response.getOutputStream());
    }
}

import java.awt.*;
import java.text.*;

import org.jfree.chart.*;
import org.jfree.chart.plot.*;
import org.jfree.chart.axis.*;
import org.jfree.chart.renderer.xy.*;
import org.jfree.data.time.*;
import org.jfree.ui.*;

public class MovingAverageDemo extends ApplicationFrame {
  public MovingAverageDemo(String title, String data, int y1, int m1, int y2, int m2, double[] val) {
      super(title);
      TimeSeries ts1 = new TimeSeries(data, Month.class);
      int y = y1;
      int m = m1;
      int ix = 0;
      while((y < y2) || (m <= m2)) {
        ts1.add(new Month(m, y), val[ix]);
        m++;
        if(m > 12) {
            y++;
            m = 1;
        }
        ix++;
      }
      TimeSeries ts2 = MovingAverage.createMovingAverage(ts1, "3 month mov.avg. of " + data, 3, 0);
      TimeSeries ts3 = MovingAverage.createMovingAverage(ts1, "6 month mov.avg. of " + data, 6, 0);
      TimeSeries ts4 = MovingAverage.createMovingAverage(ts1, "12 month mov.avg. of " + data, 12, 0);
      TimeSeriesCollection dataset = new TimeSeriesCollection();
      dataset.addSeries(ts1);
      dataset.addSeries(ts2);
      dataset.addSeries(ts3);
      dataset.addSeries(ts4);
      JFreeChart chart = ChartFactory.createTimeSeriesChart(title, "Time", "Value", dataset, true, true, false);
      chart.setBackgroundPaint(Color.PINK);
      XYPlot plot = chart.getXYPlot();
      XYItemRenderer renderer = plot.getRenderer();
      System.out.println(renderer.getClass().getName());
      if (renderer instanceof XYLineAndShapeRenderer) {
        XYLineAndShapeRenderer rr = (XYLineAndShapeRenderer) renderer;
        rr.setShapesFilled(true);
        rr.setSeriesPaint(0, Color.BLACK);
        rr.setSeriesPaint(1, Color.CYAN);
        rr.setSeriesPaint(2, Color.MAGENTA);
        rr.setSeriesPaint(3, Color.ORANGE);
      }
      DateAxis axis = (DateAxis)plot.getDomainAxis();
      axis.setDateFormatOverride(new SimpleDateFormat("MMM-yyyy"));
      ChartPanel chartPanel = new ChartPanel(chart);
      chartPanel.setPreferredSize(new Dimension(800, 600));
      setContentPane(chartPanel);
      pack();
      setVisible(true);
  }
  public static void main(String[] args) {
      double[] x = { 1, 4, 9, 16, 25, 36, 30, 24, 18, 12, 6, 0, 32, 48, 56, 60, 62, 63 };
      MovingAverageDemo mad = new MovingAverageDemo("Moving Average Demo", "test data", 2003, 1, 2004, 6, x);
  }
}