JFormattedtextField and MaskFormatter
How do I tell maskformatter to check valid characters with his mask (no letter if I want a digit) and only use the valueclass constructor at the end(focuslost).
How do I enter "120" in following example and have a DivisableByThree as value in the textfield afterwards:
publicclass TryFormat{
publicstaticvoid main(String[] args){
try{
MaskFormatter formatter =new MaskFormatter("#-#-#");
formatter.setPlaceholderCharacter('0');
// lucky 000 passes, what if * is used
formatter.setValueContainsLiteralCharacters(false);
formatter.setCommitsOnValidEdit(false);
formatter.setValueClass(DivisableByThree.class);
JFormattedTextField textField =new JFormattedTextField(formatter);
JOptionPane.showMessageDialog(null, textField);
System.out.println(textField.getValue());
}catch (Exception ex){ex.printStackTrace();}
}
}
publicclass DivisableByThree{
String number;
public DivisableByThree(String number)throws ParseException{
System.out.println("DivisableByThree "+number);
if (!(Integer.parseInt(number) % 3 == 0))
thrownew ParseException("try again", 0);
this.number = number;
}
}
Thanks,
Bart
[2314 byte] By [
bartvdca] at [2007-11-27 9:39:29]
# 1
import java.awt.event.FocusEvent;
import java.text.ParseException;
import javax.swing.*;
import javax.swing.text.MaskFormatter;
public class TryFormat {
public static void main( String[] args ) {
try {
MaskFormatter formatter = new MaskFormatter( "#-#-#" );
formatter.setPlaceholderCharacter( '0' );
// lucky 000 passes, what if * is used
formatter.setValueContainsLiteralCharacters( false );
formatter.setCommitsOnValidEdit( false );
formatter.setValueClass( DivisableByThree.class );
JFormattedTextField textField = new JFormattedTextField( formatter ) {
protected void processFocusEvent(FocusEvent e) {
if ( e.getID() == FocusEvent.FOCUS_GAINED ) {
((MaskFormatter)getFormatter()).setValueClass( String.class );
} else {
((MaskFormatter)getFormatter()).setValueClass( DivisableByThree.class );
}
super.processFocusEvent(e);
}
};
JOptionPane.showMessageDialog( null, textField );
System.out.println( textField.getValue() );
} catch ( Exception ex ) {
ex.printStackTrace();
}
System.exit(0);
}
static public class DivisableByThree {
String number;
public DivisableByThree( String number ) throws ParseException {
System.out.println( "DivisableByThree " + number );
if ( !( Integer.parseInt( number ) % 3 == 0 ) )
throw new ParseException( "try again", 0 );
this.number = number;
}
public String toString() { return number; }
}
}
JayDSa at 2007-7-12 23:14:58 >
# 2
Thanks for this creative solution.
It works if I enter a value and push "OK". The value is set and it's a DivisableByTree.
There is just a problem when you loose focus. Fill in 123 and hit tab. The field is cleared and it's no longer possible to fill in something.
Thanks again for the reply,
Bart
