JFreeChart 标签宽度答案

【问题标题】：JFreeChart Label WidthJFreeChart 标签宽度
【发布时间】：2016-05-13 17:56:26
【问题描述】：

我是 JFreeChart 的新手。

附上我的图表。如您所见，标签被截断。如何指定标签的宽度以避免截断（我有足够的空间可以容纳它们）？

我目前的代码如下：

   DefaultCategoryDataset dataset = new DefaultCategoryDataset();

    dataset.setValue(24, "Major", "Mathematics");
    dataset.setValue(20, "Major", "Philosophy");
    dataset.setValue(18, "Major", "Chemical Engineering");
    dataset.setValue(15, "Major", "Sociology");
    dataset.setValue(14, "Major", "Stuff");
    dataset.setValue(13, "Major", "A Program");
    dataset.setValue(13, "Major", "Bleg");

    JFreeChart chart = ChartFactory.createBarChart(" ", "Major", "Score", dataset, PlotOrientation.HORIZONTAL,
            false, true, false);
    CategoryPlot plot = chart.getCategoryPlot();

    Font font1 = new Font("Dialog", Font.PLAIN, 25);
    Font font2 = new Font("Dialog", Font.PLAIN, 15);
    Font font3 = new Font("Dialog", Font.PLAIN, 25);

    plot.getDomainAxis().setLabelFont(font3);
    plot.getRangeAxis().setLabelFont(font3);

    CategoryAxis axisDomain = plot.getDomainAxis();
    ValueAxis axisRange = plot.getRangeAxis();

    axisDomain.setTickLabelFont(font1);

    axisRange.setTickLabelFont(font2);
    chart.setAntiAlias(true);

【问题讨论】：

标签： java jfreechart

【解决方案1】：

在here 建议的方法中，下面的示例覆盖了getPreferredSize()。

import java.awt.Dimension;
import java.awt.EventQueue;
import java.awt.Font;
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.ValueAxis;
import org.jfree.chart.plot.CategoryPlot;
import org.jfree.chart.plot.PlotOrientation;
import org.jfree.data.category.DefaultCategoryDataset;

/**
 * @see https://stackoverflow.com/a/37216788/230513
 */
public class Test {

    private void display() {
        JFrame f = new JFrame("Test");
        f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        DefaultCategoryDataset dataset = new DefaultCategoryDataset();
        dataset.setValue(24, "Major", "Mathematics");
        dataset.setValue(20, "Major", "Philosophy");
        dataset.setValue(18, "Major", "Chemical Engineering");
        dataset.setValue(15, "Major", "Sociology");
        dataset.setValue(14, "Major", "Stuff");
        dataset.setValue(13, "Major", "A Program");
        dataset.setValue(13, "Major", "Bleg");
        JFreeChart chart = ChartFactory.createBarChart("Title", "Major", "Score",
            dataset, PlotOrientation.HORIZONTAL, false, true, false);
        CategoryPlot plot = chart.getCategoryPlot();
        Font font1 = new Font("Dialog", Font.PLAIN, 25);
        Font font2 = new Font("Dialog", Font.PLAIN, 15);
        Font font3 = new Font("Dialog", Font.PLAIN, 25);
        plot.getDomainAxis().setLabelFont(font3);
        plot.getRangeAxis().setLabelFont(font3);
        CategoryAxis axisDomain = plot.getDomainAxis();
        axisDomain.setTickLabelFont(font1);
        ValueAxis axisRange = plot.getRangeAxis();
        axisRange.setTickLabelFont(font2);
        chart.setAntiAlias(true);
        f.add(new ChartPanel(chart){
            @Override
            public Dimension getPreferredSize() {
                return new Dimension(1024, 512);
            }
        });
        f.pack();
        f.setLocationRelativeTo(null);
        f.setVisible(true);
    }

    public static void main(String[] args) {
        EventQueue.invokeLater(new Test()::display);
    }
}

【讨论】：