如何使用JFreeChart绘制数组中的数据?

Question

我需要画一个图，以便在x轴上有"i"数据，在y轴上有"massAngle [i]"数据。我尝试这样做：

for (int i = 0; i < massAngle.length; i++) {
XYSeries series = new XYSeries("1");
series.add(i, massAngle[i]);
XYSeriesCollection seriesCollection = new XYSeriesCollection(series);
final JFreeChart chart = ChartFactory.createXYLineChart("Долгота и Широта",
"Долгота", "Широта", seriesCollection, PlotOrientation.VERTICAL, true, true, false);
final ChartPanel chartPanel = new ChartPanel(chart);
chartPanel.setPreferredSize(new Dimension(1150, 470));
panel.add(chartPanel);
}

Answer 1

您正在创建一个新XYSeriesCollection，一个新的JFChart数组的每个元素的新ChartPanel，您必须执行一次：创建一个XYSeries添加所有数据并构建一个图表：

XYSeries series = new XYSeries("1");
for (int i = 0; i < massAngle.length; i++) {
series.add(i, massAngle[i]);
}
XYSeriesCollection seriesCollection = new XYSeriesCollection(series);
final JFreeChart chart = ChartFactory.createXYLineChart("Долгота и Широта", "Долгота", 
"Широта", seriesCollection, PlotOrientation.VERTICAL, true, true, false);
final ChartPanel chartPanel = new ChartPanel(chart);
chartPanel.setPreferredSize(new Dimension(1150, 470));
panel.add(chartPanel);