mi sto aiutando con questo codice
codice:
public class LineChartDemo6 extends ApplicationFrame
{
public LineChartDemo6(final String title)
{
super(title);
final XYDataset dataset = createDataset();
final JFreeChart chart = createChart(dataset);
final ChartPanel chartPanel = new ChartPanel(chart);
chartPanel.setPreferredSize(new java.awt.Dimension(500, 270));
setContentPane(chartPanel);
}
private XYDataset createDataset()
{
final XYSeries series = new XYSeries("Chart");
try
{
DataInputStream dis = null;
String record = null;
int recCount = 0;
File file = new File("045528f7.txt");
file = file.getAbsoluteFile();
String path=String.valueOf(file);
System.out.println(path);
File f = new File(path);
FileInputStream fis = new FileInputStream(f);
BufferedInputStream bis = new BufferedInputStream(fis);
dis = new DataInputStream(bis);
record=dis.readLine();
while ( (record=dis.readLine()) != null )
{
recCount++;
String values=record;
String comma=",";
int location= values.indexOf(comma);
String xvalue=values.substring(0,location);
String yvalue=values.substring(location+1);
long x_val= Integer.valueOf(xvalue);
long y_val= Integer.valueOf(yvalue);
series.add(x_val,y_val);
}
}
catch(Exception e)
{
}
final XYSeriesCollection dataset = new XYSeriesCollection();
dataset.addSeries(series);
return dataset;
}
/*
* Creates a chart.
*
* @param dataset the data for the chart.
*
* @return a chart.
*/
private JFreeChart createChart(final XYDataset dataset)
{
// create the chart...
final JFreeChart chart = ChartFactory.createXYLineChart(
"Line Chart Demo 6 ",
"X",
"Y",
dataset,
PlotOrientation.VERTICAL,
//Using PlotOrientation.HORIZONTAL would display 'x' values 'vertically' & 'y' values horizontally.
true,
true,
false
);
/* createXYLineChart(String title,
String xAxisLabel,
String yAxisLabel,XYDataset dataset,
PlotOrientation,
boolean
legend,boolean tooltips,
boolean urls) */
// NOW DO SOME OPTIONAL CUSTOMISATION OF THE CHART...
chart.setBackgroundPaint(Color.white);
// final StandardLegend legend = (StandardLegend) chart.getLegend();
// legend.setDisplaySeriesShapes(true);
// get a reference to the plot for further customisation...
final XYPlot plot = chart.getXYPlot();
plot.setBackgroundPaint(Color.lightGray);
// plot.setAxisOffset(new Spacer(Spacer.ABSOLUTE, 5.0, 5.0, 5.0, 5.0));
plot.setDomainGridlinePaint(Color.white);
plot.setRangeGridlinePaint(Color.white);
final XYLineAndShapeRenderer renderer = new XYLineAndShapeRenderer();
renderer.setSeriesLinesVisible(1,true);
renderer.setSeriesShapesVisible(1,false);
plot.setRenderer(renderer);
// change the auto tick unit selection to integer units only...
final NumberAxis rangeAxis = (NumberAxis) plot.getRangeAxis();
rangeAxis.setStandardTickUnits(NumberAxis.createIntegerTickUnits());
// OPTIONAL CUSTOMISATION COMPLETED.
return chart;
}
// Starting point for the demonstration application.
// @param args ignored.
public static void main(final String args[])
{
final LineChartDemo6 demo = new LineChartDemo6("Line Chart Demo 6");
demo.pack();
RefineryUtilities.centerFrameOnScreen(demo);
demo.setVisible(true);
}
}
Originariamente inviata da cyro1986
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