Autocomplete Date in a textfield

Question

How can I achieve autocompletion of dates in a textfield. If somebody inserts say 12 the backslash character automatically appears "/". Can somebody helped me out.

Answer 1

Hello,
you have to override document's insertString or in a custom textfield override createDefaultModel and return a new PlainDocument with custom insertString:package temp;
import javax.swing.*;
import javax.swing.text.*;
class Temp extends JFrame
     Temp()
          setDefaultCloseOperation(EXIT_ON_CLOSE);
          initContentPane();
          pack();
          setLocationRelativeTo(null);
          setVisible(true);
     private void initContentPane()
          SeperatorField field = new SeperatorField(10);
          getContentPane().add(field);
     class SeperatorField extends JTextField
          SeperatorField()
               super();
          SeperatorField(int length)
               super(length);
          protected Document createDefaultModel()
               return new PlainDocument()
                    public void insertString(int offs, String str, AttributeSet a)
                         throws BadLocationException
                         if (str == null)
                              return;
                         int length = this.getLength()+str.length();System.out.println(length);
                         if(length ==2 || length == 5)
                              str=str.concat("/");
                         if(length>10)
                              return;
                         super.insertString(offs, str, a);
     public static void main(String[] args)
          new Temp();
}you can check for numbers the same way etc.
regards,
Tim