更改 y 轴和 x 轴值的字体大小

Question

在下面的代码中，我想减小 y 轴和 x 轴值的字体大小。

我搜索并找到了这些代码：

假设你想缩小数字轴的字体大小使用下面的代码：

Font nwfont=new Font("Arial",0,7);
NumberAxis rangeAxis = (NumberAxis) plot.getRangeAxis();
rangeAxis.setTickLabelFont(nwfont);

假设您想减小 CategoryAxis 的字体大小，请使用以下代码：

CategoryAxis domainAxis = plot.getDomainAxis();
domainAxis.setTickLabelFont(nwfont);

但不幸的是，轴的大小并没有减少。我是不是做错了什么？

此示例代码：

 public class NegativeExpPlot {

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

        private void display() {
            int nData = 100;
            Random r = new Random(nData);
            XYSeries ds1 = new XYSeries("rand");
            for (int i = 0; i < nData; i++) {
                ds1.add(r.nextDouble(), r.nextDouble() / 1000);
            }
            for (int i = 0; i < nData; i++) {
                ds1.add(r.nextDouble(), r.nextDouble() * 1000);
            }
            LogAxis logAxis = new LogAxis("log");
            XYPlot p = new XYPlot(new XYSeriesCollection(ds1), new NumberAxis(),
                logAxis, new XYLineAndShapeRenderer());
            logAxis.setNumberFormatOverride(new DecimalFormat("0.0E0"));
            Font nwfont=new Font("Arial",0,1);
            logAxis.setTickLabelFont(nwfont);
            JFreeChart chart = new JFreeChart(p);
            JFrame f = new JFrame("Log Axis");
            f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
            f.add(new ChartPanel(chart));
            f.pack();
            f.setLocationRelativeTo(null);
            f.setVisible(true);
            NumberAxis rangeAxis = (NumberAxis) p.getRangeAxis();
            rangeAxis.setTickLabelFont(nwfont);
        }

    }

Answer 1

这是一个错误，已在 issue #98: setTickLabelFont is not respected for LogAxis if setNumberFormatOverride is used. It is fixed in branch v1.5.x. You can omit the override, use the workaround in the bug report, or build jfreechart-1.5.4-SNAPSHOT.jar, illustrated, like this 中报告。

import java.awt.EventQueue;
import java.awt.Font;
import java.io.IOException;
import java.text.DecimalFormat;
import java.util.Random;
import javax.swing.JFrame;
import org.jfree.chart.ChartPanel;
import org.jfree.chart.JFreeChart;
import org.jfree.chart.axis.LogAxis;
import org.jfree.chart.axis.NumberAxis;
import org.jfree.chart.plot.XYPlot;
import org.jfree.chart.renderer.xy.XYLineAndShapeRenderer;
import org.jfree.data.xy.XYSeries;
import org.jfree.data.xy.XYSeriesCollection;

/** @see  */
public class ExpoTest {

    private static final int N = 100;
    private static final Font FONT = new Font(Font.SANS_SERIF, Font.BOLD, 16);

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

    private void display() {
        Random r = new Random();
        XYSeries series = new XYSeries("rand");
        for (int i = 0; i < N; i++) {
            series.add(r.nextDouble(), r.nextDouble() / 1000);
        }
        NumberAxis domainAxis = new NumberAxis();
        domainAxis.setTickLabelFont(FONT);
        LogAxis rangeAxis = new LogAxis("log");
        rangeAxis.setTickLabelFont(FONT);
        rangeAxis.setNumberFormatOverride(new DecimalFormat("0.0E0"));
        XYPlot p = new XYPlot(new XYSeriesCollection(series), domainAxis,
            rangeAxis, new XYLineAndShapeRenderer());
        JFreeChart chart = new JFreeChart(p);
        JFrame f = new JFrame("Log Axis");
        f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        f.add(new ChartPanel(chart));
        f.pack();
        f.setLocationRelativeTo(null);
        f.setVisible(true);
    }
}

更改 y 轴和 x 轴值的字体大小

Change the font size of the y-axis and x-axis values

java

swt

jfreechart