JFreeChart:鼠标悬停时带有工具提示的自定义图表

import org.jfree.chart.ChartFactory;
import org.jfree.chart.ChartFrame;
import org.jfree.chart.JFreeChart;
import org.jfree.chart.labels.StandardCategoryToolTipGenerator;
import org.jfree.chart.plot.PlotOrientation;
import org.jfree.data.category.DefaultCategoryDataset;

public class JFreeChartExample {
    public static void main(String[] args) {
        // 创建数据集
        DefaultCategoryDataset dataset = new DefaultCategoryDataset();
        dataset.addValue(1.0, "Series 1", "Category 1");
        dataset.addValue(2.0, "Series 1", "Category 2");
        dataset.addValue(3.0, "Series 1", "Category 3");
        dataset.addValue(4.0, "Series 2", "Category 1");
        dataset.addValue(5.0, "Series 2", "Category 2");
        dataset.addValue(6.0, "Series 2", "Category 3");

        // 创建图表
        JFreeChart chart = ChartFactory.createBarChart(
                "Chart Title",
                "Category",
                "Value",
                dataset,
                PlotOrientation.VERTICAL,
                true,
                true,
                false
        );

        // 设置工具提示
        chart.getCategoryPlot().getRenderer().setBaseToolTipGenerator(
                new StandardCategoryToolTipGenerator()
        );

        // 显示图表
        ChartFrame frame = new ChartFrame("Chart", chart);
        frame.pack();
        frame.setVisible(true);
    }
}