import javax.swing.*;
import javax.swing.text.*;
import java.awt.*;
import javax.swing.table.*;
import java.text.*;

public class Estudos extends JFrame{
  MaskFormatter cep;
  
  public Estudos(){
    super("Exemplo de uma tabela simples");
		
    try{
      cep = new MaskFormatter("#####-###");
      cep.setPlaceholderCharacter('_');
    }
    catch(ParseException excp){
      //
    }
    
    // colunas da tabela
    String[] colunas = {"Nome", "Cidade", "CEP"};
		
    // conteúdo da tabela	
    Object[][] conteudo = {
        {"Osmar J. Silva", "Goiânia", "54232-654"},
        {"Maria Clara Gomes", "São Paulo", "65476-433"}
    };
        
    // constrói a tabela
    JTable tabela = new JTable(conteudo, colunas);
    
    TableColumn col = tabela.getColumnModel().getColumn(2);
    col.setCellEditor(new MyJFTEditor(cep));
    
    tabela.setPreferredScrollableViewportSize(new Dimension(350, 50));
	
    Container c = getContentPane();
    c.setLayout(new FlowLayout());
			
    JScrollPane scrollPane = new JScrollPane(tabela);
    c.add(scrollPane);
    	
    setSize(400, 300);
    setVisible(true);
  }
	
  public static void main(String args[]){
    Estudos app = new Estudos();
    app.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
  }
}

class MyJFTEditor extends DefaultCellEditor{
  public MyJFTEditor(MaskFormatter cep){
    super(new JFormattedTextField(cep));
  }
}