Why doesn't work this Applet?
Code: Select all
import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.FlowLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.BorderFactory;
import javax.swing.JApplet;
import javax.swing.JButton;
import javax.swing.JPanel;
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.axis.ValueAxis;
import org.jfree.chart.plot.CombinedDomainXYPlot;
import org.jfree.chart.plot.XYPlot;
import org.jfree.chart.renderer.xy.StandardXYItemRenderer;
import org.jfree.data.time.Millisecond;
import org.jfree.data.time.TimeSeries;
import org.jfree.data.time.TimeSeriesCollection;
/**
* A demonstration application showing a time series chart where you can dynamically add
* (random) data by clicking on a button.
*
*/
public class combined extends JApplet implements ActionListener {
/** The number of subplots. */
public static final int SUBPLOT_COUNT = 3;
/** The datasets. */
private TimeSeriesCollection[] datasets;
/** The most recent value added to series 1. */
private double[] lastValue = new double[SUBPLOT_COUNT];
/**
* Constructs a new demonstration application.
*
* @param title the frame title.
*/
public combined(final String title) {
final CombinedDomainXYPlot plot = new CombinedDomainXYPlot(new DateAxis("Time"));
this.datasets = new TimeSeriesCollection[SUBPLOT_COUNT];
for (int i = 0; i < SUBPLOT_COUNT; i++) {
this.lastValue[i] = 100.0;
final TimeSeries series = new TimeSeries("Random " + i, Millisecond.class);
this.datasets[i] = new TimeSeriesCollection(series);
final NumberAxis rangeAxis = new NumberAxis("Y" + i);
rangeAxis.setAutoRangeIncludesZero(false);
final XYPlot subplot = new XYPlot(
this.datasets[i], null, rangeAxis, new StandardXYItemRenderer()
);
subplot.setBackgroundPaint(Color.lightGray);
subplot.setDomainGridlinePaint(Color.white);
subplot.setRangeGridlinePaint(Color.white);
plot.add(subplot);
}
final JFreeChart chart = new JFreeChart("Dynamic Data Demo 3", plot);
// chart.getLegend().setAnchor(Legend.EAST);
chart.setBorderPaint(Color.black);
chart.setBorderVisible(true);
chart.setBackgroundPaint(Color.white);
plot.setBackgroundPaint(Color.lightGray);
plot.setDomainGridlinePaint(Color.white);
plot.setRangeGridlinePaint(Color.white);
// plot.setAxisOffset(new Spacer(Spacer.ABSOLUTE, 4, 4, 4, 4));
final ValueAxis axis = plot.getDomainAxis();
axis.setAutoRange(true);
axis.setFixedAutoRange(60000.0); // 60 seconds
final JPanel content = new JPanel(new BorderLayout());
final ChartPanel chartPanel = new ChartPanel(chart);
content.add(chartPanel);
final JPanel buttonPanel = new JPanel(new FlowLayout());
for (int i = 0; i < SUBPLOT_COUNT; i++) {
final JButton button = new JButton("Series " + i);
button.setActionCommand("ADD_DATA_" + i);
button.addActionListener(this);
buttonPanel.add(button);
}
final JButton buttonAll = new JButton("ALL");
buttonAll.setActionCommand("ADD_ALL");
buttonAll.addActionListener(this);
buttonPanel.add(buttonAll);
content.add(buttonPanel, BorderLayout.SOUTH);
chartPanel.setPreferredSize(new java.awt.Dimension(500, 470));
chartPanel.setBorder(BorderFactory.createEmptyBorder(5, 5, 5, 5));
setContentPane(content);
}
/**
* Handles a click on the button by adding new (random) data.
*
* @param e the action event.
*/
public void actionPerformed(final ActionEvent e) {
for (int i = 0; i < SUBPLOT_COUNT; i++) {
if (e.getActionCommand().endsWith(String.valueOf(i))) {
final Millisecond now = new Millisecond();
System.out.println("Now = " + now.toString());
this.lastValue[i] = this.lastValue[i] * (0.90 + 0.2 * Math.random());
this.datasets[i].getSeries(0).add(new Millisecond(), this.lastValue[i]);
}
}
if (e.getActionCommand().equals("ADD_ALL")) {
final Millisecond now = new Millisecond();
System.out.println("Now = " + now.toString());
for (int i = 0; i < SUBPLOT_COUNT; i++) {
this.lastValue[i] = this.lastValue[i] * (0.90 + 0.2 * Math.random());
this.datasets[i].getSeries(0).add(new Millisecond(), this.lastValue[i]);
}
}
}
}
Read