自定义的JFreeChart标题字体太小了 [英] Custom JFreeChart title font is far too small

问题描述

我试图用代码为 JFreeChart 中的标题设置自定义 Font

  InputStream is = new FileInputStream（test.ttf）; 
 java.awt.Font customFont = java.awt.Font.createFont（java.awt.Font.TRUETYPE_FONT，is）; 
 customFont.deriveFont（24f）; 
 chart.getTitle（）。setFont（customFont）; 
  

结尾的字体非常小（几乎看不见）：

任何想法如何添加一个自定义字体到 JFreeChart title？

  public class Function2DDemo1 extends ApplicationFrame {
 
 public Function2DDemo1（String title）{
 super（title）; 
 JPanel chartPanel = createDemoPanel（）; 
 chartPanel.setPreferredSize（new java.awt.Dimension（500，270））; 
 setContentPane（chartPanel）; 
 
 
 private static JFreeChart createChart（XYDataset dataset）{
 //创建图表... 
 JFreeChart图表= ChartFactory.createXYLineChart（Function2DDemo1，/ / chart 
 // title 
X，// x轴标签
Y，// y轴标签
 dataset，//数据
 PlotOrientation。 VERTICAL，true，//包含图例
 true，//工具提示
 false //网址
）; 
 
 //设置自定义标题字体
尝试{
 InputStream is = new FileInputStream（test.ttf）; 
 java.awt.Font customFont = java.awt.Font.createFont（java.awt.Font.TRUETYPE_FONT，is）; 
 customFont.deriveFont（24f）; 
 chart.getTitle（）。setFont（customFont）; 
} catch（FileNotFoundException e）{
 e.printStackTrace（）; 
} catch（FontFormatException e）{
 e.printStackTrace（）; 
} catch（IOException e）{
 e.printStackTrace（）; 
} 
 
 XYPlot plot =（XYPlot）chart.getPlot（）; 
 plot.getDomainAxis（）。setLowerMargin（0.0）; 
 plot.getDomainAxis（）。setUpperMargin（0.0）; 
回报图; 
 
 
 public static XYDataset createDataset（）{
 XYDataset result = DatasetUtilities.sampleFunction2D（new X2（），-4.0，4.0，40，f（x）） ; 
返回结果; 
 
 
 public static JPanel createDemoPanel（）{
 JFreeChart chart = createChart（createDataset（））; 
返回新的ChartPanel（图表）; 
 
 
 static class X2 implements Function2D {
 
 public double getValue（double x）{
 return x * x + 2; 
 
 
 
 $ b public static void main（String [] args）{
 Function2DDemo1 demo = new Function2DDemo1（JFreeChart：Function2DDemo1.java ）; 
 demo.pack（）; 
 RefineryUtilities.centerFrameOnScreen（demo）; 
 demo.setVisible（true）; 
 
 
 $ / code $ / pre 
 
解决方案
  deriveFont 方法返回您忘记存储的字体对象。将您的代码更改为： 
 
 
  customFont = customFont.deriveFont（24f）; 
  
我用这个修正测试了你的代码，使用 http://www.urbanfonts.com ，它似乎工作得很好（在Windows上）。我的猜测是，当你加载一个字体文件，默认大小是1。
 
I am trying to set a custom Font for the title in JFreeChart with the code:
    InputStream is = new FileInputStream("test.ttf");
    java.awt.Font customFont = java.awt.Font.createFont(java.awt.Font.TRUETYPE_FONT, is);
    customFont.deriveFont(24f);
    chart.getTitle().setFont(customFont);
Ends up with a very small font title(almost invisible):



Any ideas how to add a custom Font to JFreeChart title?
public class Function2DDemo1 extends ApplicationFrame {

    public Function2DDemo1(String title) {
        super(title);
        JPanel chartPanel = createDemoPanel();
        chartPanel.setPreferredSize(new java.awt.Dimension(500, 270));
        setContentPane(chartPanel);
    }

    private static JFreeChart createChart(XYDataset dataset) {
        // create the chart...
        JFreeChart chart = ChartFactory.createXYLineChart("Function2DDemo1 ", // chart
                                                                                // title
        "X", // x axis label
        "Y", // y axis label
        dataset, // data
        PlotOrientation.VERTICAL, true, // include legend
        true, // tooltips
        false // urls
        );

        // SET A CUSTOM TITLE FONT
        try {
            InputStream is = new FileInputStream("test.ttf");
            java.awt.Font customFont = java.awt.Font.createFont(java.awt.Font.TRUETYPE_FONT, is);
            customFont.deriveFont(24f);
            chart.getTitle().setFont(customFont);
        } catch (FileNotFoundException e) {
            e.printStackTrace();
        } catch (FontFormatException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }

        XYPlot plot = (XYPlot) chart.getPlot();
        plot.getDomainAxis().setLowerMargin(0.0);
        plot.getDomainAxis().setUpperMargin(0.0);
        return chart;
    }

    public static XYDataset createDataset() {
        XYDataset result = DatasetUtilities.sampleFunction2D(new X2(), -4.0, 4.0, 40, "f(x)");
        return result;
    }

    public static JPanel createDemoPanel() {
        JFreeChart chart = createChart(createDataset());
        return new ChartPanel(chart);
    }

    static class X2 implements Function2D {

        public double getValue(double x) {
            return x * x + 2;
        }

    }

    public static void main(String[] args) {
        Function2DDemo1 demo = new Function2DDemo1("JFreeChart: Function2DDemo1.java");
        demo.pack();
        RefineryUtilities.centerFrameOnScreen(demo);
        demo.setVisible(true);
    }
}

解决方案
The deriveFont method returns a Font object that you forgot to store. Change your code to:
customFont = customFont.deriveFont(24f);
I tested your code, with this fix, using a free font from http://www.urbanfonts.com and it seems to work just fine (on Windows). My guess is that when you load a font file, the default size is 1.

                        
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