Java tutorial
package org.jfree.chart.demo; import java.awt.Color; import java.awt.Dimension; import javax.swing.JPanel; import org.jfree.chart.ChartFactory; import org.jfree.chart.ChartPanel; import org.jfree.chart.JFreeChart; import org.jfree.chart.axis.CompassFormat; import org.jfree.chart.axis.NumberAxis; import org.jfree.chart.axis.NumberTickUnit; import org.jfree.chart.axis.TickUnits; import org.jfree.chart.plot.XYPlot; import org.jfree.chart.renderer.xy.XYAreaRenderer; import org.jfree.data.time.Minute; import org.jfree.data.time.RegularTimePeriod; import org.jfree.data.time.TimeSeries; import org.jfree.data.time.TimeSeriesCollection; import org.jfree.data.xy.XYDataset; import org.jfree.ui.ApplicationFrame; import org.jfree.ui.RefineryUtilities; public class CompassFormatDemo1 extends ApplicationFrame { private static final long serialVersionUID = 1L; public CompassFormatDemo1(String s) { super(s); JPanel jpanel = createDemoPanel(); jpanel.setPreferredSize(new Dimension(500, 270)); setContentPane(jpanel); } private static XYDataset createDirectionDataset(int i) { TimeSeriesCollection timeseriescollection = new TimeSeriesCollection(); TimeSeries timeseries = new TimeSeries("Wind Direction"); Object obj = new Minute(); double d = 180D; for (int j = 0; j < i; j++) { timeseries.add(((RegularTimePeriod) (obj)), d); obj = ((RegularTimePeriod) (obj)).next(); d += (Math.random() - 0.5D) * 15D; if (d < 0.0D) { d += 360D; continue; } if (d > 360D) d -= 360D; } timeseriescollection.addSeries(timeseries); return timeseriescollection; } private static XYDataset createForceDataset(int i) { TimeSeriesCollection timeseriescollection = new TimeSeriesCollection(); TimeSeries timeseries = new TimeSeries("Wind Force"); Object obj = new Minute(); double d = 3D; for (int j = 0; j < i; j++) { timeseries.add(((RegularTimePeriod) (obj)), d); obj = ((RegularTimePeriod) (obj)).next(); d = Math.max(0.5D, d + (Math.random() - 0.5D) * 0.5D); } timeseriescollection.addSeries(timeseries); return timeseriescollection; } private static JFreeChart createChart() { XYDataset xydataset = createDirectionDataset(600); JFreeChart jfreechart = ChartFactory.createTimeSeriesChart("Time", "Date", "Direction", xydataset, true, true, false); XYPlot xyplot = (XYPlot) jfreechart.getPlot(); xyplot.getDomainAxis().setLowerMargin(0.0D); xyplot.getDomainAxis().setUpperMargin(0.0D); NumberAxis numberaxis = (NumberAxis) xyplot.getRangeAxis(); numberaxis.setAutoRangeIncludesZero(false); TickUnits tickunits = new TickUnits(); tickunits.add(new NumberTickUnit(180D, new CompassFormat())); tickunits.add(new NumberTickUnit(90D, new CompassFormat())); tickunits.add(new NumberTickUnit(45D, new CompassFormat())); tickunits.add(new NumberTickUnit(22.5D, new CompassFormat())); numberaxis.setStandardTickUnits(tickunits); xyplot.setRangeAxis(numberaxis); XYAreaRenderer xyarearenderer = new XYAreaRenderer(); NumberAxis numberaxis1 = new NumberAxis("Force"); numberaxis1.setRange(0.0D, 12D); xyarearenderer.setSeriesPaint(0, new Color(0, 0, 255, 128)); xyplot.setDataset(1, createForceDataset(600)); xyplot.setRenderer(1, xyarearenderer); xyplot.setRangeAxis(1, numberaxis1); xyplot.mapDatasetToRangeAxis(1, 1); return jfreechart; } public static JPanel createDemoPanel() { JFreeChart jfreechart = createChart(); return new ChartPanel(jfreechart); } public static void main(String args[]) { CompassFormatDemo1 compassformatdemo1 = new CompassFormatDemo1("Compass Format Demo"); compassformatdemo1.pack(); RefineryUtilities.centerFrameOnScreen(compassformatdemo1); compassformatdemo1.setVisible(true); } }