Is It Possible To Set Input Numbers for JTextFiled?

[mahmoud saleh]

greetings all
i have a JTextField For Inputting numbers only
when trying to input digits,the windos settings is to write in english
so Numbers Are Typed 0123456789
but i want when the user tries to input numbers it's automatically typed in arabic numbers,any ideas how to do that?

[Campbell Ritchie]

Sounds like something I ought to move to the Swing forum . . .

Several ways to do it; you can set up a regular expression to test the text; you might get "\\d*" to work.
You can parse the text into an int then print it back in Arabic script. You could even have a KeyListener or something which listens for keystrokes. But you will probably get better answers on the Swing forum.

[mahmoud saleh]

are there any samples like this?

[Michael Dunn]

a DocumentFilter might be an option, but how are you handling pasting of text?

[mahmoud saleh]

really didnot think of that
i didnot do such a behaviour before

[Brian Cole]

Originally posted by mahmoud saleh:
i have a JTextField For Inputting numbers only
when trying to input digits,the windos settings is to write in english
so Numbers Are Typed 0123456789
but i want when the user tries to input numbers it's automatically typed in arabic numbers,any ideas how to do that?

First of all, we should be careful with terminology because in
many parts of the world 0123456789 are called "Arabic numerals".
(as opposed to Roman numerals: I, II, III, IV, V, VI, VII, VIII, IX)

But I take it you want to see ٠١٢٣٤٣٥٦٧٨٩ from unicode block 0600?
(For lack of a better name, I'll call these "Arabic Arabic" numerals.)

If so, I'm not sure this best way, but it should work:

import java.awt.*;
import javax.swing.*;
import javax.swing.text.*;
 
public class ArabicArabicNumbers extends DocumentFilter {
 
    public static char toUnicodeBlock0600(char ch) {
        switch (ch) {
            case '0': return '٠'; // or return '\u06F0';
            case '1': return '١'; // '\u0661'
            case '2': return '٢'; // '\u0662'
            case '3': return '٣'; // '\u0663'
            case '4': return '٤'; // '\u0664'
            case '5': return '٥'; // '\u0665'
            case '6': return '٦'; // '\u0666'
            case '7': return '٧'; // '\u0667'
            case '8': return '٨'; // '\u0668'
            case '9': return '٩'; // '\u0669'
        }
    }
 
    public static String toUnicodeBlock0600(String s) {
        int len = s.length();
        StringBuilder sb = new StringBuilder(len); // pre-JDK5? use StringBuffer instead
        for (int j=0; j < len; j+=1) {
            sb.append( toUnicodeBlock0600(s.charAt(j)) );
        }
        return sb.toString();
    }
 
    @Override
    public void insertString(FilterBypass fb, int offset, String text, AttributeSet attr ) throws BadLocationException {
        super.insertString(fb, offset, toUnicodeBlock0600(text), attr);
    }
 
    @Override
    public void replace( FilterBypass fb, int offset, int length, String text, AttributeSet attrs ) throws BadLocationException
    {
        super.replace(fb, offset, length, toUnicodeBlock0600(text), attrs);
    }
 
    public static void main(String[] argv) {
        JTextField tf = new JTextField(12);
        ((AbstractDocument)tf.getDocument()).[B]setDocumentFilter[/B]( new ArabicArabicNumbers() );
 
        JFrame f = new JFrame();
        f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        f.getContentPane().setLayout(new FlowLayout());
        f.getContentPane().add(tf);
        f.setSize(200, 100);
        f.setVisible(true);
    }
}

There shouldn't be any left-to-right vs. right-to-left orientation issues.
[ October 10, 2008: Message edited by: Brian Cole ]