JFreeChart-时间序列图 JFreeChart-时间序列图|JFreeChart

本文概述

时间序列图示例
TimeSeriesChartExample.java

时间序列图表示一系列数字数据, 它们以相等的时间间隔变化。
下图显示了JFreeChart库中合并的时间序列图的一些演示版本：
【JFreeChart-时间序列图】时间序列图演示1：

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时间序列图演示2：

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时间序列图演示3：

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时间序列图演示4：

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时间序列图演示5：

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时间序列图示例让我们考虑一下时间序列图的以下示例数据。

日期	系列一	系列二
2017-01-01	50	40
2017-01-02	40	35
2017-01-03	45	26
2017-01-04	30	45
2017-01-05	50	40
2017-01-06	45	35
2017-01-07	60	45
2017-01-08	45	48
2017-01-09	55	31
2017-01-10	48	32
2017-01-11	60	21
2017-01-12	45	35
2017-01-13	65	10
2017-01-14	45	25
2017-01-15	55	15

以下代码从上述示例数据创建气泡图：
TimeSeriesChartExample.java

import java.awt.Color; import javax.swing.JFrame; import javax.swing.SwingUtilities; import javax.swing.WindowConstants; import org.jfree.chart.ChartFactory; import org.jfree.chart.ChartPanel; import org.jfree.chart.JFreeChart; import org.jfree.chart.plot.XYPlot; import org.jfree.data.time.Day; import org.jfree.data.time.TimeSeries; import org.jfree.data.time.TimeSeriesCollection; import org.jfree.data.xy.XYDataset; public class TimeSeriesChartExample extends JFrame {private static final long serialVersionUID = 1L; public TimeSeriesChartExample(String title) {super(title); // Create datasetXYDataset dataset = createDataset(); // Create chartJFreeChart chart = ChartFactory.createTimeSeriesChart("Time Series Chart Example", // Chart"Date", // X-Axis Label"Number", // Y-Axis Labeldataset); //Changes background colorXYPlot plot = (XYPlot)chart.getPlot(); plot.setBackgroundPaint(new Color(255, 228, 196)); ChartPanel panel = new ChartPanel(chart); setContentPane(panel); }private XYDataset createDataset() {TimeSeriesCollection dataset = new TimeSeriesCollection(); TimeSeries series1 = new TimeSeries("Series1"); series1.add(new Day(1, 1, 2017), 50); series1.add(new Day(2, 1, 2017), 40); series1.add(new Day(3, 1, 2017), 45); series1.add(new Day(4, 1, 2017), 30); series1.add(new Day(5, 1, 2017), 50); series1.add(new Day(6, 1, 2017), 45); series1.add(new Day(7, 1, 2017), 60); series1.add(new Day(8, 1, 2017), 45); series1.add(new Day(9, 1, 2017), 55); series1.add(new Day(10, 1, 2017), 48); series1.add(new Day(11, 1, 2017), 60); series1.add(new Day(12, 1, 2017), 45); series1.add(new Day(13, 1, 2017), 65); series1.add(new Day(14, 1, 2017), 45); series1.add(new Day(15, 1, 2017), 55); dataset.addSeries(series1); TimeSeries series2 = new TimeSeries("Series2"); series2.add(new Day(1, 1, 2017), 40); series2.add(new Day(2, 1, 2017), 35); series2.add(new Day(3, 1, 2017), 26); series2.add(new Day(4, 1, 2017), 45); series2.add(new Day(5, 1, 2017), 40); series2.add(new Day(6, 1, 2017), 35); series2.add(new Day(7, 1, 2017), 45); series2.add(new Day(8, 1, 2017), 48); series2.add(new Day(9, 1, 2017), 31); series2.add(new Day(10, 1, 2017), 32); series2.add(new Day(11, 1, 2017), 21); series2.add(new Day(12, 1, 2017), 35); series2.add(new Day(13, 1, 2017), 10); series2.add(new Day(14, 1, 2017), 25); series2.add(new Day(15, 1, 2017), 15); dataset.addSeries(series2); return dataset; }public static void main(String[] args) {SwingUtilities.invokeLater(() -> {TimeSeriesChartExample example = new TimeSeriesChartExample("Time Series Chart"); example.setSize(800, 400); example.setLocationRelativeTo(null); example.setVisible(true); example.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE); }); }}

输出：