Mostrando Valores em JFormattedTextField

private Connection conexao = null;
   public ResultSet rs_sb1    = null;
   public Statement st_sb1    = null;
   public String qy_sb1       = null;

   private JTextField jt_Codigo;
   private JTextField jt_Descricao;
   private JFormattedTextField jt_Preco;

   private float   xPreco;

xPreco = rs_sb1.getFloat(7);
   JOptionPane.showMessageDialog(C.this, xPreco, "", JOptionPane.PLAIN_MESSAGE);

try { 
         javax.swing.text.MaskFormatter xPreco = new javax.swing.text.MaskFormatter("###,##0.00");
           jt_Preco = new javax.swing.JFormattedTextField(xPreco);
      }  catch(Exception f){}
      c.add ( jt_Preco );
      jt_Preco.setBounds ( 150, 130, 100, 20 );