java 左右横向柱状图

生成Java左右横向柱状图可以使用Java的图形库，例如JavaFX或JFreeChart。

以下是一个使用JFreeChart库生成左右横向柱状图的示例代码：

import java.awt.Color;
import java.awt.Dimension;
import javax.swing.JFrame;
import org.jfree.chart.ChartFactory;
import org.jfree.chart.ChartPanel;
import org.jfree.chart.JFreeChart;
import org.jfree.chart.axis.CategoryAxis;
import org.jfree.chart.axis.NumberAxis;
import org.jfree.chart.plot.CategoryPlot;
import org.jfree.chart.plot.PlotOrientation;
import org.jfree.chart.renderer.category.BarRenderer;
import org.jfree.data.category.DefaultCategoryDataset;

public class HorizontalBarChartExample extends JFrame {
    
    public HorizontalBarChartExample() {
        // Create dataset
        DefaultCategoryDataset dataset = new DefaultCategoryDataset();
        dataset.addValue(1, "Series 1", "Category 1");
        dataset.addValue(2, "Series 1", "Category 2");
        dataset.addValue(3, "Series 1", "Category 3");
        dataset.addValue(4, "Series 1", "Category 4");
        dataset.addValue(5, "Series 1", "Category 5");
        
        // Create chart
        JFreeChart chart = ChartFactory.createBarChart(
                "Horizontal Bar Chart Example",
                "Value",
                "Category",
                dataset,
                PlotOrientation.HORIZONTAL,
                false,
                true,
                false);
        
        // Set chart background color
        chart.setBackgroundPaint(Color.white);
        
        // Get plot
        CategoryPlot plot = chart.getCategoryPlot();
        
        // Set plot background color
        plot.setBackgroundPaint(Color.lightGray);
        
        // Set axis ranges
        NumberAxis rangeAxis = (NumberAxis) plot.getRangeAxis();
        rangeAxis.setRange(0, 10);
        
        // Set bar colors
        BarRenderer renderer = (BarRenderer) plot.getRenderer();
        renderer.setSeriesPaint(0, Color.blue);
        
        // Set category label positions
        CategoryAxis domainAxis = plot.getDomainAxis();
        domainAxis.setCategoryLabelPositions(CategoryLabelPositions.STANDARD);
        
        // Create chart panel
        ChartPanel chartPanel = new ChartPanel(chart);
        chartPanel.setPreferredSize(new Dimension(500, 300));
        
        // Add chart panel to frame
        setContentPane(chartPanel);
    }
    
    public static void main(String[] args) {
        HorizontalBarChartExample example = new HorizontalBarChartExample();
        example.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        example.pack();
        example.setLocationRelativeTo(null);
        example.setVisible(true);
    }
}

该代码创建了一个左右横向柱状图，并使用了JFreeChart库中的一些属性来设置图表的外观和行为。你可以根据需要更改这些属性来创建符合你需求的左右横向柱状图。