Sérios problemas com JFormattedTextField[RESOLVIDO]

import javax.swing.JFrame;   
import java.awt.FlowLayout;   
import java.text.ParseException;

import javax.swing.JFormattedTextField;   
import javax.swing.text.MaskFormatter;   
  
public class Frame extends JFrame{   
        /**
	 * 
	 */
	private static final long serialVersionUID = 1L;
		private JFormattedTextField data, telefone;//campo para data e telefone   
        private MaskFormatter Dat, Tel;//Atributo formatador para data e telefone   
           
    public Frame(){   
        setTitle("ESTUDOS");   
        try {
			Tel = new MaskFormatter("####-####");
		} catch (ParseException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}   
        try {
			Dat = new MaskFormatter("##/##/####");
		} catch (ParseException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}         
         telefone = new JFormattedTextField(Tel);   
        data = new JFormattedTextField(Dat);   
        Tel.setValidCharacters("[telefone removido]");   
        Dat.setValidCharacters("[telefone removido]");   
        telefone.setColumns(6);   
        data.setColumns(6);   
        add(telefone);   
        add(data);         
        getContentPane().setLayout(new FlowLayout());;   
        setVisible(true);   
        setSize(300, 400);   
        setLocationRelativeTo(null);   
    }   
    public static void main(String[] args){   
        new Frame();   
    }   
  
}