Java 如何在JFreechart中添加其他文本？

我只想添加有关图表的其他详细信息。我怎样才能包括其他细节，如在下面的图片

尝试注释（例如XYDrawableAnnotation）。下面是一个例子：

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34，00000是计数器值。根据需要设置计数器值。在（x，y）轴上

您可以使用图形对象修改图表。 要获取图表的图形对象，请执行以下操作：

创建图表

获取图形的缓冲图像

获取缓冲图像图形并修改它们

将修改后的缓冲图像转换为png或jpg格式

以下是代码片段：

// fetch chart as buffered image    
BufferedImage image = chart.createBufferedImage(width, height);
// fetch graphics from the buffered image for perform modifications.
Graphics2D g2 = (Graphics2D) image.getGraphics();
g2.setFont(g2.getFont().deriveFont(30f));
g2.setColor(Color.red);
g2.setFont(new Font(Font.SANS_SERIF, Font.PLAIN, fontSize));
String str = "Test String";
float location_x = 200;
float location_y = 200;
// will draw string horizontally
TextUtilities.drawAlignedString(str, g2, location_x, 
        location_y, TextAnchor.CENTER_LEFT);
// will draw string Vertically
TextUtilities.drawRotatedString(str, g2, -Math.PI / 2,
        location_x, location_y);
g2.dispose();
// generate png file from the modified buffered image
String path = "/sample/test.png";
try {
  ImageIO.write(image, "png", new File(path));
} catch (IOException e) {
  System.out.println("Error While Creating chart");
  e.printStackTrace();
}

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@Radu Murzea，在我没有与JFreechart合作之前。我只是希望解决方案可能与XYTEXTAnnotation有关。这意味着你需要添加标签，是吗？？是指包含文本的标签吗？

// fetch chart as buffered image    
BufferedImage image = chart.createBufferedImage(width, height);
// fetch graphics from the buffered image for perform modifications.
Graphics2D g2 = (Graphics2D) image.getGraphics();
g2.setFont(g2.getFont().deriveFont(30f));
g2.setColor(Color.red);
g2.setFont(new Font(Font.SANS_SERIF, Font.PLAIN, fontSize));
String str = "Test String";
float location_x = 200;
float location_y = 200;
// will draw string horizontally
TextUtilities.drawAlignedString(str, g2, location_x, 
        location_y, TextAnchor.CENTER_LEFT);
// will draw string Vertically
TextUtilities.drawRotatedString(str, g2, -Math.PI / 2,
        location_x, location_y);
g2.dispose();
// generate png file from the modified buffered image
String path = "/sample/test.png";
try {
  ImageIO.write(image, "png", new File(path));
} catch (IOException e) {
  System.out.println("Error While Creating chart");
  e.printStackTrace();
}