To precisando de ajuda com threads

public synchronized void run(){
        try{
            UIManager.setLookAndFeel(new NimbusLookAndFeel());
            login = new frmLogin();
            login.setVisible(true);
            conectar = new Conecta(login.host,login.usuario_db,login.senha_db);
            if(conectar.retorna==1){
                JOptionPane.showMessageDialog(login, "Conectou beleza!",vrs.titulo,vrs.info);
                conectar.fechaConn();
            }
            
        }catch(java.sql.SQLException e){
            JOptionPane.showMessageDialog(login,e.getMessage(),vrs.titulo,vrs.erro);
        }catch(UnsupportedLookAndFeelException lafE){
            JOptionPane.showMessageDialog(login,lafE.getClass().toString());
        }catch(ParseException pE){
            JOptionPane.showMessageDialog(login,pE.getClass().toString());
        }catch(Exception e){
            JOptionPane.showMessageDialog(login,e.getMessage());
        }
    }