Question

我需要绘制一个图形，以便在x轴上有＆＃34; i＆＃34;数据，在y轴上将有＆＃34; massAngle [i]＆＃34;数据。我试着这样做：

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

您正在为阵列的每个元素创建新的XYSeriesCollection，新的JFChart新的ChartPanel，您必须执行一次：创建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);

如何使用JFreeChart绘制数组中的数据？

1 个答案: