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SetFont doesn't work for Chinese in JTextPane on Fedora


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  #1  
Old December 13th, 2012, 02:31 AM
marlonmin marlonmin is offline
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SetFont doesn't work for Chinese in JTextPane on Fedora
Hello, in the following code, there is a Chinese word in the html tag. If I set content type as "text/html", then it can't display Chinese correctly; for plain text, it's fine. I am working on Fedora linux. Can't figure out what's the problem. Thank you for any comments.

Code:
import java.awt.Font;
import java.awt.GraphicsEnvironment;
import java.util.Locale;

import javax.swing.*;

 public class MyFont extends JPanel{

    public MyFont() {
        
    	String text = "<html lang=\"zh\">\n" +
                "Color and font test:\n" +
                "<ul>\n" +
                "<li><font color=red>中国</font>\n" +
                "<li><font color=blue>blue</font>\n" +
                "<li><font color=green>green</font>\n" +
                "<li><font size=-2>small</font>\n" +
                "<li><font size=+2>large</font>\n" +
                "<li><i>italic</i>\n" +
                "<li><b>bold</b>\n" +
                "</ul>\n";
 
        JTextPane htmlTextArea = new JTextPane();
        htmlTextArea.setContentType("text/html");
        htmlTextArea.setFont(getChineseFont());
        htmlTextArea.setText(text);
        JPanel panel = new JPanel();
        panel.add(htmlTextArea);
        add(panel);
        
    }
 
    private Font getChineseFont(){
 	   
		Font[] allfonts = GraphicsEnvironment.getLocalGraphicsEnvironment().getAllFonts();
		String chinesesample = "中文";
		for (int j = 0; j < allfonts.length; j++) {
		    if (allfonts[j].canDisplayUpTo(chinesesample) == -1) { 
		        System.out.println(allfonts[j].getName());
		    	return new Font(allfonts[j].getFontName(), Font.PLAIN, 16);
		    }	  	    
		}
		return null;
   }
    public static void main(String[] args) {
    	JFrame frame = new JFrame("HtmlDemo");
        frame.add(new MyFont());
        frame.pack();
        frame.setVisible(true);
    }
}
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  #2  
Old December 13th, 2012, 03:53 AM
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Where you are setting the content type for the htmlTextArea, try setting the type like this instead:
Code:
htmlTextArea.setContentType("text/html;charset=big5");


See if that works for you.
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  #3  
Old December 13th, 2012, 09:47 PM
marlonmin marlonmin is offline
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Quote:
Originally Posted by Scorpions4ever
Where you are setting the content type for the htmlTextArea, try setting the type like this instead:
Code:
htmlTextArea.setContentType("text/html;charset=big5");


See if that works for you.


This doesn't work either.
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  #4  
Old December 14th, 2012, 06:28 AM
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Unicode escape sequence
Try convert the Chinese characters to unicode entities:

Java Code:
Original - Java Code 
  1.  
  2. import java.awt.Font;
  3. import java.awt.GraphicsEnvironment;
  4. import java.util.Locale;
  5.  
  6. import javax.swing.*;
  7.  
  8.  public class MyFont extends JPanel{
  9.  
  10.     public MyFont() {
  11.         
  12.         String text = "<html lang=\"zh\">\n" +
  13.                 "Color and font test:\n" +
  14.                 "<ul>\n" +
  15.                 "<li><font color=red>"+"&#"+"20013;"+"&#"+"22269;"+"</font>\n" +
  16.                 "<li><font color=blue>blue</font>\n" +
  17.                 "<li><font color=green>green</font>\n" +
  18.                 "<li><font size=-2>small</font>\n" +
  19.                 "<li><font size=+2>large</font>\n" +
  20.                 "<li><i>italic</i>\n" +
  21.                 "<li><b>bold</b>\n" +
  22.                 "</ul>\n";
  23.  
  24.         JTextPane htmlTextArea = new JTextPane();
  25.         htmlTextArea.setContentType("text/html");
  26.         htmlTextArea.setFont(getChineseFont());
  27.         htmlTextArea.setText(text);
  28.         JPanel panel = new JPanel();
  29.         panel.add(htmlTextArea);
  30.         add(panel);
  31.         
  32.     }
  33.  
  34.     private Font getChineseFont(){
  35.        
  36.         Font[] allfonts = GraphicsEnvironment.getLocalGraphicsEnvironment().getAllFonts();
  37.         String chinesesample = "&#"+"20013;"+ "&#"+ "25991;";
  38.         for (int j = 0; j < allfonts.length; j++) {
  39.             if (allfonts[j].canDisplayUpTo(chinesesample) == -1) { 
  40.                 System.out.println(allfonts[j].getName());
  41.                 return new Font(allfonts[j].getFontName(), Font.PLAIN, 16);
  42.             }          
  43.         }
  44.         return null;
  45.    }
  46.     public static void main(String[] args) {
  47.         JFrame frame = new JFrame("HtmlDemo");
  48.         frame.add(new MyFont());
  49.         frame.pack();
  50.         frame.setVisible(true);
  51.     }
  52. }
  53.  


Note:
I have to break up the unicode entities as a series of string concatenation due to the browser's conversion of unicode entities back to Chinese characters when the post was displayed.
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Last edited by tvc3mye : December 14th, 2012 at 06:35 AM. Reason: make the unicode entities display as is.
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  #5  
Old December 15th, 2012, 02:53 PM
marlonmin marlonmin is offline
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Quote:
Originally Posted by tvc3mye
Try convert the Chinese characters to unicode entities:

Java Code:
Original - Java Code 
  1.  
  2. import java.awt.Font;
  3. import java.awt.GraphicsEnvironment;
  4. import java.util.Locale;
  5.  
  6. import javax.swing.*;
  7.  
  8.  public class MyFont extends JPanel{
  9.  
  10.     public MyFont() {
  11.         
  12.         String text = "<html lang=\"zh\">\n" +
  13.                 "Color and font test:\n" +
  14.                 "<ul>\n" +
  15.                 "<li><font color=red>"+"&#"+"20013;"+"&#"+"22269;"+"</font>\n" +
  16.                 "<li><font color=blue>blue</font>\n" +
  17.                 "<li><font color=green>green</font>\n" +
  18.                 "<li><font size=-2>small</font>\n" +
  19.                 "<li><font size=+2>large</font>\n" +
  20.                 "<li><i>italic</i>\n" +
  21.                 "<li><b>bold</b>\n" +
  22.                 "</ul>\n";
  23.  
  24.         JTextPane htmlTextArea = new JTextPane();
  25.         htmlTextArea.setContentType("text/html");
  26.         htmlTextArea.setFont(getChineseFont());
  27.         htmlTextArea.setText(text);
  28.         JPanel panel = new JPanel();
  29.         panel.add(htmlTextArea);
  30.         add(panel);
  31.         
  32.     }
  33.  
  34.     private Font getChineseFont(){
  35.        
  36.         Font[] allfonts = GraphicsEnvironment.getLocalGraphicsEnvironment().getAllFonts();
  37.         String chinesesample = "&#"+"20013;"+ "&#"+ "25991;";
  38.         for (int j = 0; j < allfonts.length; j++) {
  39.             if (allfonts[j].canDisplayUpTo(chinesesample) == -1) { 
  40.                 System.out.println(allfonts[j].getName());
  41.                 return new Font(allfonts[j].getFontName(), Font.PLAIN, 16);
  42.             }          
  43.         }
  44.         return null;
  45.    }
  46.     public static void main(String[] args) {
  47.         JFrame frame = new JFrame("HtmlDemo");
  48.         frame.add(new MyFont());
  49.         frame.pack();
  50.         frame.setVisible(true);
  51.     }
  52. }
  53.  


Note:
I have to break up the unicode entities as a series of string concatenation due to the browser's conversion of unicode entities back to Chinese characters when the post was displayed.


Does that work for you? I got the same problem on Fedora.
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  #6  
Old December 17th, 2012, 12:44 AM
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Font problem?
If this does not work on your OS, could it be that your Fedora does not have a font that supports Chinese character display.
The following post I found from StackOverflow forum may be helpful to you:

How to make java application display Chinese under Fedora core 5
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