Restricting numeric input

[Timea Darryl]

I am new to Java, and I am trying to make 3 text fields; but I want the input in each of those text fields restricted to 1 digit(between 0-9). How can I do this?javascript: x()
Confused

[Mark Spritzler]

OK, is this a Swing Textfield or an HTML one?

Mark

[Timea Darryl]

It is a Swing JTextField

[Michael Dunn]

> It is a Swing JTextField

you could set your own document for the textfield,
but a simpler solution might be to use a JSpinner

import javax.swing.*;
import java.awt.*;
import javax.swing.text.*;
class Testing extends JFrame
{
  public Testing()
  {
    setLocation(400,300);
    setDefaultCloseOperation(EXIT_ON_CLOSE);
    JPanel jp = new JPanel(new GridLayout(2,1));
    jp.add(new JTextField(new NumberLimiter(),"",5));
    jp.add(new JSpinner(new SpinnerNumberModel(0,0,9,1)));
    getContentPane().add(jp);
    pack();
  }
  class NumberLimiter extends PlainDocument
  {
    public void insertString(int offs, String str, AttributeSet a) throws BadLocationException
    {
      if(str.length() > 1 || this.getLength() > 0 || "0123456789".indexOf(str) < 0)
      {
        java.awt.Toolkit.getDefaultToolkit().beep();
        return;
      }
      super.insertString(offs, str, a);
    }
  }
  public static void main(String[] args){new Testing().setVisible(true);}
}

[Timea Darryl]

Wow! Thanks, Michael, that is amazing. I compiled it and ran it, and it looks awesome, although I do not understand how it works. I understand the spinner, in fact I wanted to use the Choice()class, but I am restricted to JTextField or JFormattedTextField, and everything I found on the net about restricting input to the JTextField was too confusing. So now I am going to try to figure out what you did with that number limiter class. Thanks again.

[Sunil Kumar Gupta]

Hey Michael, It was great.......as simple as i always wanted

it was not my problem , but i used this code...

Thanks

[vikassheel gupta]

hi
In java script u have to use the ascii value in between 48- 57
so on the basis of that u can do that
byeeeeeeeee
enjoy